Answer:
there was a large drop in population from all the deaths, which means the economy was not very strong.
Explanation:
The main reason why president Roosevelt refused to work with president Hoover is because the two men shared practically opposite views on how to fix the economy, with FDR favoring large-scale government intervention and Hoover favoring a "hands off" approach.
D. the north opposed slavery before the civil war and the South didn't. In this situation d is the answer but note for future reference slavery issue was not the only cause for the civil war.