How Did the Boxer Rebellion Affect U

How did the Boxer Rebellion affect U.S. policy in China?

A) The United States realized that China would not cooperate with the Open Door policy and began to join the European nations in dividing up China.
B) The United States affirmed the Open Door policy and declared China's independence from any foreign (European) rule.
C) The United States saw that China was determined to keep out foreign influence, so it withdrew to the Philippines to avoid armed conflict.
D) The United States realized that anti-imperialists back home wanted it to withdraw from China, so it negotiated secretly.
E) The rebellion in Canada turned U.S. attention away from China and to the anti-imperialist demonstrations closer to home.