D. The Soviet Union and Chinese helped Korean communists gain power in the north.
The 21st President of the United States was Chester A Arthur- he was president between 1881 and 1885. Prior to becoming president, he was the 20th Vice President, and he chose not to have a Vice President during his term. He became president after James A Garfield died. Prior to 1854, he was part of the Whig Party. However, from 1854 until his death in 1886, he was a republican.
He was born on the 5th October 1829 and died on 18th November 1886- at the age of 57.
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D which would be armed conflict with the Southern soldiers
