In Which Situation Might Observations Be Used to Test a Hypothesis

Multiple Choice

In which situation might observations be used to test a hypothesis rather than a laboratory experiment?

A) to test the effects of caffeine on the behavior of adolescent males and females
B) to test the relationship between dinosaur fossils found in Canada and the United States
C) to test how antioxidants in vitamins will affect skin cancer cells in college students
D) to test the ability of Alzheimer's patients to identify the smell of specific odors