This sentence does not use a comma where one is necessary. Commas should always come before any direct quotation that appears in the middle of a sentence. A comma should appear after the word "said." Note that one of the choices offers this, but has single quotation marks (single quotation marks should only be used when the quote appears within another existing quotation). The correct choice is, "once said, "Life isn't about finding yourself. Life is about creating yourself." "

This sentence does not contain a comma where one is necessary. Since the phrase "It is always important to stretch before running" is a direct quote, a comma should appear after the word "said." A colon could also be used (though, commas are more appropriate), but not with single quotation marks, since this is not a quote within a quote.

The verb in the underlined portion of the sentence is in the present tense, while the verb in the first part of the sentence is in the past tense. The two verbs need to match their tenses due to the construction of the sentence. The correct answer choice is " none proved satisfactory."

The use of the phrase "for all intensive purposes," as it is in this sentence, is incorrect. The idiom is actually "for all intents and purposes," which indicates that every element was considered. "For all intents and purposes, the new plan was essentially the same," is the correct answer choice as it is the only one that uses the correct idiom.

The original sentence is the best version of the complete sentence. The comma punctuation here is being used to separate the noun ("Sally") from a describing characteristic. The appositive clause ("she is a baker") is being offset from the rest of the sentence to rename a proper noun with the use of two commas.

This sentence contains an error in verb voice. The phrase "Japanese longswords...are considered..." is in the passive voice. Since there is already an interrupting appositive renaming the subject here, it is best to simply re-phrase this sentence in the active voice in order to avoid an overly wordy and complex sentence. The most clear and concise choice in this instance is, "Many individuals consider Japanese longswords, katanas, the best swords in the world." The other choices are too wordy or contain inconsistencies (e.g. longswords...a katana).

This sentence misuses the commas in this sentence. When the word "that" is used, what would be a relative clause becomes part of the main clause, therefore making commas inappropriate, as it no longer separates anything. "Which" would be an appropriate choice, but only if both commas are there: none of the options offer this choice. The best choice is, "inventions that we use every day had their start."

This sentence contains an error in the usage of the comma. Commas should only appear before a coordinating conjunction like "and" when the conjunction joins two independent clauses. The phrase "took much pride in the pieces that adorned her walls" is not an independent clause, however. If the phrase had the word "she" before the word "took," then the comma would be appropriate. The correct choice is, "a collector of fine arts and took much pride in the peices."

This sentence does not contain a comma where one is needed. The phrase "after running" is an example of an introductory phrase, explaining information necessary to the context of the sentence, but outside of the main sentence, grammatically. These types of phrases must be followed by a comma in order to separate them from the rest of the sentence. The correct choice is: "After running, he decided to eat a snack and watch."

The phrase "which were essential for the company's records" is an example of a relative clause, which gives more information about its antecedent: the documents. Any such phrase that occurs in the middle of a sentence must be introduced and completed with a comma. You would not use hyphens to separate these clauses; usually, hyphens are more common between clauses when adding an interjection. The correct answer choice, which corrects the error without changing the meaning of the sentence, is "the documents, which were essential for the company's records, meant Fatima would."