In order to discourage Japan from expanding its empire in East Asia and the
Pacific, the United States:
A. used its navy to blockade Japanese ports and prevent warships
from leaving Japan.
O
B. announced that it would declare war on Japan if it attacked any of
its neighbors.
C. organized a massive bombing campaign of military bases on the
Japanese mainland.
O
D. placed economic sanctions on Japanese assets and stopped
exporting oil to Japan.