Your Best Friend Criticizes Psychological Research for Being Artificial and Having

Your best friend criticizes psychological research for being artificial and having no relevance to behavior in real life. In defense of psychology's use of laboratory experiments you point out that

A) psychologists make every attempt to avoid artificiality by setting up experiments that closely simulate real-world environments.
B) psychologists who conduct basic research are not concerned with the applicability of their findings to the real world.
C) most psychological research is not conducted in a laboratory environment.
D) psychologists intentionally study behavior in simplified environments in order to gain greater control over variables and to test general principles that help to explain many behaviors.