Why, According to Abbate, Don't Military Commanders Have an Obligation

Multiple Choice

Why, according to Abbate, don't military commanders have an obligation to order soldiers to take extra risks to avoid collateral casualties?

A) Because commanders have an obligation to do whatever is necessary to achieve legitimate military objectives.
B) Because commanders are obligated not to order soldiers to do anything that would endanger their lives.
C) Because commanders are morally forbidden from attacking civilians as a means to achieving a military objective.
D) Because commanders' responsibilities toward their own soldiers takes priority over their responsibilities toward civilians of enemy countries.