One Major Purpose of Conducting Experiments Is to Decide Whether

One major purpose of conducting experiments is to decide whether a treatment or program effectively changes behavior.The second major purpose for doing experiments is to provide

A) an empirical test of hypotheses derived from theories.
B) simple and relatively quick ways of testing and revising hypotheses.
C) methods to obtain results that demonstrate that what we expect from our hypothesis will be confirmed.
D) definitive answers to theoretical questions.