Following the Protests About the Vietnam War in the 1960's

Multiple Choice

Following the protests about the Vietnam War in the 1960's and 70's,a cross-sectional study was undertaken to examine if that generation had a greater interest in politics than their parents.The hypothesis was supported,however,critics pointed out a major flaw in the study.Which of the following might be a flaw in the study?

A) It doesn't explain why there might be age differences in the interest in politics.
B) There may have been cohort effects as the younger generation were being forced to join the army.
C) That particular generation were known for their passion on political issues.
D) They probably had a lot of participants drop out over the time the study was conducted.