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.

i discarded the supernatant and kept the pellet in this part of the experiment because you have to return all unused chemicals into their original containers at the end of each labratory.

explanation: