When Jeffrey Was in Iraq, the Colonel Who Was in Command

When Jeffrey was in Iraq, the colonel who was in command of his unit told the troops to destroy all the homes in the towns they passed through.Jeffrey didn't think that this was the right thing to do, but he followed the colonel's orders.The process that best explains Jeffrey's actions in this instance is:

A) informational conformity
B) normative conformity
C) obedience
D) social facilitation