Answer: it’s C or D how do I know?...
Explanation: The SDS-organized March Against the Vietnam War onto Washington, D.C. was the largest anti-war demonstration in the U.S. to date with 15,000 to 20,000 people attending. Paul Potter demands a radical change of society.
The answer is A because they are explaining the different methods of settlement.
Transcontinental railroad and the bessemer process