Nonexperimental tests of causal hypotheses will continue to be popular because ______.

Question

A. they give the same results as experimental tests, so cost is the more relevant concern
B. there are practical and ethical problems in randomly assigning people in experiments
C. they have to be conducted only once, while experimental studies must be repeated many times
D. they result in findings that are more likely to be causally valid than experimental tests

Answer 1

Answer: B