Evaluate Argument Logic Practice Test

A university librarian notes that during the past year, the number of students who checked out printed books declined while the number of students who accessed the library’s online database increased. The librarian concludes that students prefer digital sources to printed books and that the university should reduce spending on printed materials and allocate those funds to expanding digital subscriptions. The argument is most vulnerable to which criticism?​​​

A health columnist claims: "People who take daily vitamin supplements report fewer colds each winter than people who do not. Therefore, vitamins prevent colds, and employers should provide free supplements to reduce sick days." Which of the following best describes the reasoning employed in the argument?