What was the significance of the battle of stalingrad?
a. the soviet victory is considered a turning point in the war.
b. it led to germany's capture of the red army in 1943.
c. it forced the soviet union to reconsider its commitment to the allied cause.
d. it slowed down the russian invasion of german territory begun in 1941.
i think it's b but i just want to double check

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.