What was the main reason given by Americans who supported the atomic bombing of Japan? 1. American casualties in a conventional attack would have been too high.

2. The Japanese would have used atomic weapons on the U. S.

3. There was nothing unusual about atomic weapons.

4. Japanese soldiers had committed war crimes against American prisoners.

Why was the u.s. annexation of hawaii delayed until william mckinley became president? a: the rebels who overthrew queen liliuokalani opposed u.s. annexation. b: the senate did not approve the treaty of annexation until mckinley entered the white house. c: supporters of the nationalist cause were in the majority in hawaii until 1898. d: mckinley’s predecessor, grover cleveland, refused to sign the treaty of annexation.