Which research question on world war ii is too narrow?
which factors led to president truman dropping atomic bombs?
o who was president of the united states at the start of world war ii?
how did the world war ii change american society?
why was world war ii bad?

Who was president of the United States at the start of World War II?

Explanation:

Keeping in mind the options given, we can affirm that the correct option is "Who was president of the United States at the start of World War II?" Since this question can be answered with a simple sentence, however, to answer the rest of the questions, we must at least explain the context of the situation and comment on the events that occurred.

Who was president of the United States at the start of WW2

Explanation:

This question can be answered in one sentence as for the other questions, they can be answered in a paragraph.

nothing certain is known about what happened, but it seems that the country declined gradually, perhaps due to bad government, or, more likely, due to a series of bad harvests, which resulted in widespread and recurrent famine.

i think that the answer is polishing peanuts