It wasn't so much the Civil War, but the expansion of the United States that led to the Civil War, that brought about the Second Industrial Revolution, since this expansion brought a need for massive amounts of railroad materials.
I think it is
c) Many cities have developed along it.
Two main things that happened during 1963? Martin Luther King, Jr.'s famous "I Have a Dream" Speech, and JFK's assassination.
Answer: B) The Ninth Amendment
This amendment states that the Constitution cannot be used to deny rights for the people, especially the rights that are not stated in the Constitution itself.