Here is your answer hope it helps:)
Answer:
On the night of August 20, 1968, approximately 200,000 Warsaw Pact troops and 5,000 tanks invade Czechoslovakia to crush the “Prague Spring”—a brief period of liberalization in the communist country. Czechoslovakians protested the invasion with public demonstrations and other non-violent tactics, but they were no match for the Soviet tanks
The answer is B since Lincoln thought slavery in general was “unjust” and wanted it abolished as well as many African Americans served for the union
