Social psychologists seldom address the question of external validity by conducting their experiments on random samples of people from all over. All of the following are reasons for this except
a. experiments capture general psychological processes experienced by all people.
b. social psychologists are content with doing inexact science.
c. it is expensive to get a random sample of people to participate in research.
d. it is pragmatically difficult to get a random sample of people to participate in research.
Answer: B
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