The Primary Diplomatic Result of Roosevelt's Diplomatic Ending of the Russo-Japanese

The primary diplomatic result of Roosevelt's diplomatic ending of the Russo-Japanese War was that

A) the United States began to ally itself with Russia against Japan.
B) both Japan and Russia became increasingly hostile to the United States.
C) U.S. relations with Japan improved.
D) U.S. relations with Russia improved.
E) China began to seek an alliance with the United States in order to check Japan and Russia.