Many American Companies Prefer to Use a U

Many American companies prefer to use a U.S.based international agency because:

A) U.S.agencies are the most creative
B) U.S.agencies understand world markets better than foreign agencies do
C) U.S.agencies give the advertiser better control of the advertising process and facilitate the coordination of international advertising
D) U.S.based agencies generally understand local markets better than agencies located in these countries
E) the U.S.culture is the most used as a basis for understanding other cultures