Recall That Carl Hovland and His Colleagues Broke Down Persuasive

Recall that Carl Hovland and his colleagues broke down persuasive messages into three components.Which of the following questions emphasizes the component called source characteristics?

A) Are people more likely to take a trip to Florida if they are in college?
B) Are people more likely to buy a car if they know how its engine works?
C) Are people more likely to buy a cleaning product if they are in a good mood?
D) Are people more likely to buy a brand of aspirin that is recommended by the American Medical Association?