The answer to the question above is letter "A. save American lives". Truman became the president succeeding President Franklin Roosevelt in April 12, 1945. Aside from what has been said, it was also his aim to shorten war for peace.
Answer:
I think it is health department. I hope this helped.
Imperialism was just big at the time, what better than to proudly say “hey, look, we have Hawaii”. That’s all I can think of... sorry if this doesn’t help at all.