What Instigated the Boxer Rebellion of 1900 in China

What instigated the Boxer Rebellion of 1900 in China?

A) The Boxers, a secret Chinese nationalist society, were opposed to Western influences and perpetrated attacks on European missionaries, merchants, and soldiers.
B) British, French, German, and Russian companies, which were interested in overtaking the paper industry in China, provoked the Chinese into war with them.
C) The discovery of oil reserves in Mongolia provoked a civil war between the Chinese imperial government and Mongolian guerillas.
D) Japanese agents aroused Chinese workers to strike and then revolt against employers.
E) British agents who wished to maintain Hong Kong's independence engineered this revolt to weaken the Chinese government.