In 1939 and 1940, Franklin Roosevelt Tried to Halt Japanese

In 1939 and 1940, Franklin Roosevelt tried to halt Japanese aggression in China and Indochina by

A) sending troops to mainland China.
B) threatening to invade Japanese holdings in the Pacific.
C) imposing economic sanctions to limit Japanese access to raw materials.
D) offering most-favored nation trade status to Japan in return for an end to hostilities.
E) bombing Japanese cities.