Which Describes Something That Barack Obama Did That Caused His

Which describes something that Barack Obama did that caused his critics to charge that he has become too powerful?

A) He established the Department of Homeland Security.-Consider This: Although this does involve the expansion of government,it was actually done by George W.Bush.
B) He proposed reforming Social Security and immigration policy.
C) He used drones to kill terrorist suspects,some of whom were American citizens.
D) He used his veto power more than any other president.