Answer:
A
Step-by-step explanation:
1. B
2. C
3. D
4. B
5. Yesterday, December 7..., During the intervening...
6. A
7. C
8. C
9. D
10. C
11. B,D
12. B,E
13. D
14. I believe that our help...
15. C
16. B
17. C
18. United States tested, United States developed, Soviet Union, Congress
19. A
20. Executive order(integrates military), Brown V.(integrated public), Civil Rights(protected) Mendez v.(Ruling)
21. D