Will mark brainliest! i know 1 is not b, 2 is not a, and 3 is not d.

1. who believed that economic security should be placed ahead of integration?

a. w. e. b. du bois
b. frank baum
c. booker t. washington
d. mark twain

2. at the beginning of world war i, the united states

a. used convoys to sink submarines.
b. stayed neutral.
c. dug trenches.
d. used tanks to fight.

3. which of the following were reasons for u. s. imperialism?

a. to open new markets
b. to go against american sentiment
c. to get new naval ships
d. none of the above