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.  

question 1: a) thurgood marshall

question 2: b) the civil rights act of 1964

question 3: c) brown v board of education

question 4: d) creation of the dept of education

question 5: a) welfare and social security

explanation:

a phrase from a poem by ralph waldo emerson about the battle of lexington and concord. emerson's words read, “here once the embattled farmers stood / and fired the shot heard round the world.”