Which of the following events was considered the end of the cold war?
a. the election of george hw bush. b. the speech by president reagan at the berlin wall. c. the signing of a mutual nonaggression pact in 1990. d. the coup against gorbachev in 1991

How did european exploration and expansion cause the african slave trade to expand? a. european explorers discovered the slave trade and expanded it across the indian ocean into south asia. b. arab armies captured european explorers and forced them into slavery. c. european traders shipped enslaved africans to work on plantations in european colonies in the americas. d.european explorers captured african people and forced them to work on their ships.