Answer: C. It caused the U.S. to reorganize the state department to improve its diplomatic relations
Explanation:
efforts to expand the Open Door policy deeper into Manchuria met with resistance from Russia and Japan, exposing the limits of the American government’s influence and knowledge about the intricacies of diplomacy. As a result, he reorganized the U.S. State Department to create geographical divisions (such as the Far East Division, the Latin American Division, etc.) in order to develop greater foreign policy expertise in each area. Thus the answer is C. It caused the U.S. to reorganize the state department to improve its diplomatic relations