The answer is C principles that restrict the extent of something.
D. historical paintings often have historical errors because of the artist’s point of view
The atomic bomb
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Transmission of communicable diseases
The causes of the Economic Boom of the 1920s were the Republican government's policies of Isolationism and Protectionism, the Mellon Plan, the Assembly line and the mass production of consumer goods such as the Ford Model T Automobile and luxury labor saving devices and access to easy credit on installment plans.
