A) Which type of experimental design is utilized to determine if an intervention causes changes in human health? A. Clinical Trial B. Population Survey C. Case-Control Study D. Cohort Study B) A study was done using 99 students in each of three elementary schools to determine whether growing their own vegetables would increase their vegetable consumption. Two of the three schools were used as the experimental groups and 1 school was used as the control group. The two experimental groups were subjected to a 10-week nutrition curriculum "Growing Your Own Vegetables for Nutrition" and one of the two experimental groups participated in growing, tending, and harvesting their own vegetables in a schoolyard vegetable garden. The control group did not participate in either activity. Students in all three groups took a pre-quiz (24-hour food recall) and post-quiz (24-hour food recall), before and after the activities. Consumption of vegetables was compared (via the 24-hour food recalls) before and after the activities (nutrition curriculum only or nutrition curriculum plus gardening activity or control). This experimental design best matches which category? A. Clinical Trial B. Population Survey C. Case-Control Study D. Cohort Study E. Quasi-Experimental Design
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