Answer:
C. Enslaved people helped each other escape.
Explanation:
A. Enslaved people knew how to fly. (Fictional)
B. Escaping slavery was not possible. (False. Many enslaved persons escaped)
C. Enslaved people helped each other escape. (True. Many people relied on one another to escape)
D. Flying was the only way to escape slavery. (Fictional. People can not grow wings in real life)
Hope this helps!!