Which are the statements?
Measured by how well he or she does the job
The answer is "Follow appropriate procedures".
"Act without thinking" and "Do nothing to help" should be wrong for obvious reasons. "Do whatever you can" probably seems like a reasonable choice, but if you do whatever you can without following appropriate procedures, then you might end up making the situation worse than it already is. You could get in someone else's way, or do something that someone isn't expecting which could waste time or cause harm.
B, a drug like that could be steroids