Question: Why should we challenge a statement such as Getting married makes people happier? Group of answer choices All of the above People cannot be randomly

Why should we challenge a statement such as "Getting married makes people happier"? Group of answer choices All of the above People cannot be randomly assigned to marital status. In the "unmarried" (vs. "married") comparison group, there may be people who are divorced or widowed. People who choose to marry are different than people who choose to be single. none of the above

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