Concerns Raised by Experiments Such as Milgram's and Zimbardo's Have

Concerns raised by experiments such as Milgram's and Zimbardo's have resulted in requirements that most social psychologists must now do which of the following?

A) have doctors or counsellors on call during every experimental procedure
B) provide immediate and detailed feedback to subjects at the conclusion of their participation in experiments
C) avoid experimental situations dealing with controversial issues altogether
D) obtain informed consent from all subjects before they participate in experiments