By the conclusion of the war millions where now living in the United States
I don't know the answer but try reading this:
https://www.history.com/topics/1960s/robert-f-kennedy
It should help give you information.
Good Luck!!
The answer for this would be B and C
The Open Door policy was a statement of principles initiated by the United States in 1899 and 1900. It called for protection of equal privileges for all countries trading with China and for the support of Chinese territorial and administrative integrity.
hope this helps :)
