Social Studies, 18.02.2020 02:15 perezsamantha3oqr0za

A group of scientists suspects that certain dietary practices are partially responsible for different rates of hypertension among adults of different ethnic/racial groups. To test their hypothesis, the researchers examine data concerning the different population groups' hypertension rates and their past dietary practices. This research is a(n) study. a. case-control
b. hypothetical
c. prospective
d. retrospective

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