I think A but I`m not a hundred % sure. :)
I'm afraid I couldn't give you a complete answer, or the answer that you're looking for, for this question regarding the Native-born Americans in 1860's since there is no map provided with this question. Try re-posting this question with the map on it.
Monarchs were able to crush most rebellions, and people won few new rights
Manchuria is your answer :)
Which is B on plato :)
I believe the answer is: the Root-Takahira Agreement
In the Root-Takahira Agreement, The united states government agreed to let go of American influence in China and not intervene in Japanese's effort to invade China. In return, the Japanese government had to hand over Philippines' territory to united states.