What Was the Purpose of Roosevelt's "Gentlemen's Agreement

What was the purpose of Roosevelt's "Gentlemen's Agreement"?

A) It stopped the flow of Japanese immigrants to America.
B) It acknowledged Japan's dominance of Korea.
C) It agreed not to bring American armed forces into the Russo-Japanese War.
D) It agreed to help finance the Russian effort to seize Korea from the Chinese.
E) It stopped the intrusion of Christian missionaries into Korea.