With Respect to the United States and Its Relationship with the Rest

With respect to the United States and its relationship with the rest of the world, it can be said that

A) the U.S. has invested more dollars in the rest of the world than foreign countries have invested in the U.S.
B) the U.S. has actively helped foreign countries finance their government deficits.
C) foreign investors hold large positions in U.S. government securities.
D) All of these.