American Membership in the North Atlantic Treaty Organization Did All

American membership in the North Atlantic Treaty Organization did all of the following for the country except

A) strengthen the containment of the Soviet Union.
B) help reintegrate Germany into the European family.
C) reduce our defense expenditures, since we would get help from other countries.
D) reassure Europeans that the United States would not abandon them.
E) strike a major blow to American isolationists.