Since the End of the Cold War

Since the end of the Cold War,

A) the United States and Russia have attempted to weaken each other through a series of "proxy wars."
B) the U.S. has largely shunned involvement in multilateral organizations.
C) the international community has meekly acquiesced to American international supremacy.
D) NATO has expanded to include a number of former Soviet satellite nations.
E) the United States has avoided preemptive actions against perceived hostile countries.