C. Viking raiders and armed bands threatened everyone, but kings had lost power and could not protect everyone. Under the feudal system, nobles could protect their property and local people by offering land in exchange for loyalty and military service.
The authority of the new provisional government was soon challenged by the Soviets, councils of representatives from the workers and Soldiers. I think the answers to your problem are Soviets and Soldiers. Brainlest?
The Boxer Rebellion was an anti-foreign and anti-christian movement in China. This was the result of western missionaries arriving in China in the 1860's to convert the locals to christianism, in a country of a predominant taosim and confucionism population. This strong anti-foreign movement was created by a group called "The Boxers" and they seeked rebellion against western powers.
The Boxer Rebellion positively affected USA-Asian relations because of the U.S. suppression of the rebellion which resulted in the end of dynasties and the initiation of the Open Door policy in China, which stopped any country from imperializing China. This event helped to take a country that had been long resentful of foreigners and open it up, overall strengthening the relationship between them and the U.S.