Strengthen an Argument Practice Test

A city parks department planted 500 new trees in a downtown area. Two years later, measurements show that average summer afternoon temperatures on streets with the new trees are 1.2°C lower than on comparable streets without new trees. The department concludes that planting additional trees throughout the city will substantially reduce the city’s overall summer heat and recommends reallocating funds from other beautification projects to tree planting. Which statement provides the strongest support for the conclusion?

A health clinic began sending text-message reminders to patients 24 hours before scheduled appointments. In the next quarter, the clinic’s no-show rate fell from 12% to 8%. The clinic manager concludes that text reminders reduce no-shows and recommends implementing the same reminder system for all clinics in the network. Which of the following, if true, most strengthens the argument?