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What was the focus of the stanford study-pls

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.

The first ten amendments, known as the bill of rights, protect individual freedoms and limit the power of the federal government. what amendment limits the powers of the state government and extends bill of rights' protections to citizens of a state? a) 12th amendment b) 14th amendment c) 15th amendment d) 17th amendment