Answer: a. Jiang had collaborated with the Japanese during WWII.
Explanation:
They achieved weakening the Nazis and helping to boost morale of the allied powers.
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Not sure what your options are but hope this helps
I believe 3 is the answer, because I think the U.S bought a part of Mexico.
It's a treaty of peace between the United states of America and Mexican Republic signed on February 2, 1848 in the Villa Guadalupe. Because of this treaty of peace the war between two parties ended that dat. the said location of the treaty is the place where the two countries engulf.