I believe the answer is C. Let me know if this helps
Glasnost (openness) and Perestroika were the policies adopted by Mikhail
Gorbachev (answer C.) to save the Soviet economy- Gorbachev received Nobel Peace Prize for this.
The answer is C. (He was surrounded on three sides by Grant) because the lesson states, "Army of the Potomac was parked outside the capital on three sides, laying siege to nearby Petersburg."
Plessy v. Ferguson- basically Louisiana passed a law saying the black people need it separate car when traveling on train not on the same as a white person.
Plessy was 1/8 African descent (was born free and other 7/8 was of European descent ) and under Louisiana rule he had to sit on a black car. eventually he sat on white only car and got into trouble, just like Rosa Parks. and he was eventually got arrested and tried.