问题详情

Which of the following is NOT one of the disadvantages of a longitudinal research？
A．The subjects may become irritated at repeated testing.
B．The participants in the study may not stay in one place for many years.
C．The behavior. of a subject in the study may be measured continuously for many years.
D．Social changes may be reflected in the behaviors of the subjects participating in the study.此题为多项选择题。请帮忙给出正确答案和分析，谢谢！