Scientists in a Central American Country Are Studying Factors That

Multiple Choice

Scientists in a Central American country are studying factors that may be associated with delayed physical growth among a group of low-income children.The children live in a region of the nation that has high levels of lead in drinking water.This study is an example of a(an) ________ study.

A) epidemiological
B) uncontrollable
C) introspective
D) conventional