The numerous near-wars and diplomatic crises of the United States in the late 1880s and 1890s demonstrated a the hostile reaction to American expansionism. b that other nations were jealous of American power. c how weak America seemed to the rest of the world. d the failure of the Monroe Doctrine. e the aggressive new national mood.

e. the aggressive new national mood.

Explanation:

The numerous near-wars and diplomatic crises of the United States of America in the late 1880s and 1890s demonstrated the aggressive new national mood.

During the late 1880s and 1890s, the United States of America was mainly tensed up and aggressive towards other nations such as the Great Britain, India, etc. Thus, it took the actions of reasonable leaders (Presidents) to avert such near-wars and diplomatic crises in the United States of America.

it was the "4. potsdam" conference that demanded the unconditional surrender of japan, since it was clear that the japanese would continue to find until the very last man otherwise.