Which of the following was not one of the major events of world war ii prior to december 1941?

a.
democratic countries in europe appeased hitler by letting hitler take the sudetenland, czechoslovakia, and austria.

b.
germany invaded poland, bringing great britain, france, and the united states into the war.

c.
japan occupied manchuria and other parts of china.

d.
japan invaded french indochina and threatened thailand, the philippines, and other pacific nations.