Note: It's best to post one question at a time. That allows answers to be more complete and give details/explanation. 
But here, quickly, are answers to the list of questions you posted:
4. The Truman Doctrine 
C. shifted from isolationist US foreign policy 
 
5. The US Policy of containment in China was effective after WWII and led to a democratic China. 
False 
 
6. What led to the creation of first suburban housing developments? 
D. G.I. Bill of Rights 
7. What supported weak western European countries economically to create thriving democracies? 
C. The Marshall Plan 
 8. Stopping the spread of communism globally through supporting democracy and capitalism: 
A. US policy of containment 
 
10. The creation of a national space program (NASA) was a main effect of 
C. the launch of Sputnik 
 
11. What was the first man-made earth satellite launched by the Soviet Union? 
C. Sputnik 
12. Because racial tension in the military needed to be reduced and Korean War need for more troops 
B. Truman signed executive order integrating military 
 
13. Why were Americans concerned they were inferior to Soviets? 
A. Sputnik launch 
 14. Who made sweeping claims against people with no evidence to back charges? 
B. McCarthy 
 15. Why were some southern schools shut down instead of integrating schools? 
B. Brown v Board 
 16. What was the period of the conflict between democratic US and communist USSR from 1945-1991? 
B. The Cold War 
 
9. What was a govt. sponsored creation of infrastructure and US military moved more efficiently? 
B. National Interstate and Defense Highways Act