From where do many of the United States's key ideas for government come? O A. ancient Greece and Rome
O B. the Constitution
O C. the judicial branch
O D. the U. S. Congress

A. ancient Greece and Rome

Explanation:

The constitution, judicial branch, and congress are all currently part of of the US government, not a source for its key ideas.  

john maynrd keynes developed new economic respose to the                           ( b. great depression if the 1930's)