it allowed them to place a roof on large buildings
B - Some communities closed their schools rather than to integrate.
While some in the the south did not want to integrate their schools, some communities refused (but not most) and they figured out plans to delay integration, transfer students to different schools and close others.
16. A
17. B
18. A
19. A
20. B
21. A
22. D
23. A
These were researched answers, but I cannot guarantee you an A, just in case, I can guarantee however that most of them may be correct.
There were several events that led up to the creation of NASA, but the biggest was the space race with Russia, which was especially heightened after Sputnik.