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.
Along the western coast of the U.S
Answer:
C ?
If it's the same book he would have wanted to return to politics and expand knowledge