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Question
The United States Department of Defense is conducting a study in which it asks a group of veterans who were in the military during the 1980s to complete a survey every five years. The survey asks about health-related topics and examines how the health of this group of veterans changes as they age. This type of longitudinal study is referred to as a _____ study.A.longitudinal
B.stepwise
C.segmented
D.progressive
Answer
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