What is east Africa and west Africas political structure 10 points!

Which of the following statements is true about germany's use of u-boats?

Why were the numbering trials held from 1945 to 1946 ?

Which of the following describes an effect of world war ll on the united states economy a. automobile companies produced a record number of cars b. many factories had to expand to produce military equipment c. the airplane industry suffered as the allies began using airplanes in combat d.cities with shipyards declined because so many ships had been sent overseas.