A rail is the tracks the road is the streets.
The word that is not one that a Politician or news personality would use to support the space Program during the 1960s is "Arrogance."
I know the answer is NOT C "During one great period of immigration--between 1891 and 1920--our nation received some 18 million men, women and children from other nations. The hard work of these immigrants helped make our economy the largest in the world."
Thats not a real word. It's a word scrambled up. That word is ponies.
Hope this helps :D