During 1940-1941, President Roosevelt Attempted to Halt Japanese Aggression in Asia

During 1940-1941, President Roosevelt attempted to halt Japanese aggression in Asia by

A) applying economic pressure on Japan through a trade embargo
B) waging a clandestine, undeclared war against Japanese naval forces in the Pacific
C) signing mutual defense pacts with other Asian nations
D) securing legislation allowing him to send troops to China
E) sending troops to fight on Japanese soil