What were the main differences in the governmental and economic systems of the Soviet Union and the United States during the Cold War? Explain?

Capitalism Vs. Communism

The main difference between the US and the USSR was that the US was a  Capitalist Country and the USSR was Communist.  In the US they use Democracy and have many more rights and freedoms.

letter d is correct.

sir thomas more, venerated in the catholic church as saint thomas more, was an english lawyer, social philosopher, author, statesman, and noted renaissance humanist. he was also a councillor to henry viii, and lord high chancellor of england from october 1529 to 16 may 1532.