Reasoning, Evidence and Appeal. Those are the three main things.
You can use gestures to emphasize key points. Volume and tone both include verbal so it isn't those, and then pace is how fast you move which usually doesn't affect key points.
The Civil Rights Act banned racial discrimination.
The 15th Amendment granted African Americans the right to vote. In the U.S. Supreme Court case Plessy v. Ferguson, it was ruled that racially separate facilities, if equal, did not violate the Constitution. Finally, in the U. S. Supreme Court case Brown v. Board of Education, it was ruled that racial segregation in public schools are unconstitutional.
It is answer A and if it's not which im sure it is, it is answer D