The fifth amendment prevents people from being tried for the same crime twice this is called

to protest slavery i would think it would be a

you didn't list the options. however, a few communist countries today are: the people's republic of china, north korea, and cuba.

john maynard keynes developed new economic theories in response to the : b) great depression of the 1930s. his theories are so important that they are known as "keynesianism". in his works he supports the idea of a government with deeper involvement and intervention to end the great depression.