An Experimental Study Is One That _____

An experimental study is one that _____.

A) attempts to capture a population's characteristics by making inferences from a sample's characteristics and testing resulting hypotheses
B) involves manipulation of one or more variables to determine the effect on another variable
C) discovers answers to the questions who, what, when, where, or how much
D) attempts to reveal why or how one variable produces changes in another
E) provides repeated measures over an extended period of time