Which of the following most limited the ability of the League of Nations to reverse Japan's invasion and occupation of Manchuria?

AThe United States was not a member of the League of Nations.

BJapan left the League following Japan's invasion and occupation of Manchuria.

CChina did not desire the League to become involved in the war with Japan

DLeague members lacked the economic and naval power to halt Japanese aggression in Manchuria

EWar and other provisions were outlawed in the Kellogg-Briand pact