The principal reason(s) that so much U.S. currency is held outside the

The principal reason(s) that so much U.S. currency is held outside the U.S is (are) ________.

A) many people around the world trust the U.S. dollar more than any other currency
B) banks all around the world find it convenient to hold large amounts of U.S. dollars
C) U.S. citizens and corporations spend a lot of dollars abroad
D) all of the above
E) none of the above

ANSWER

A