Please help me I’m really confused and please don’t reply just for points I need the answer not a link!

What features of the electoral system support the existence of a two party system and analyze one of these features and explain its role

What was the compromise that allowed california to be admitted to the union l-ala on?

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.