Select an i for the time periods when america was basically isolationist and an a for the time periods when america became more active in world affairs. before the spanish-american war under theodore roosevelt early in world war i late in world war i during the great depression

i don't see how you want other people to do your work for you and it is like you are just handing your assignment to anybody else and having them deal with it instead of your self i thought this site was for asking questions and somebody could you on it not just handing your work to somebody else to deal with it just saying don't mean to be mean just proving a fact.

explanation:

c) troops march forward in close formation against newer, more accurate weapons