Whats the answer for number 7?

the answer would be B

Explanation:

nuclear fission produces the atomic bomb, a weapon of mass destruction that uses power released by the splitting of atomic nuclei the fighting in iwo jima and okinawa affected the allies' pacific strategy because truman decided to drop the atomic bomb on mainland japan.

an economic reason that the south needed a reconstruction plan is that plantations, factories, and other businesses were destroyed during the war.