A group of scientists would like to determine lifestyle factors that are associated with the development of asthma among American children. Based on this information, the researchers should design a (an) ________ study.

A. epidemiological
B. conventional
C. in-vivo
D. double-blind


Answer: A

Nutritional Science

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a. hydrochloric acid b. sulfuric acid c. acetic acid d. citric acid

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