What historical turning point is a significant event in history that has led to lasting change

Ineed to try to get this right so i can get a good grade so can someone me

Why did the crew of the zong ship throw some captive africans overboard? a. there was not enough space in the ship. b. the captives’ deaths were covered by insurance. c. the ship did not have adequate food. d. the ship did not have sufficient crew to care for the sick captives. e. the african captives rebelled against the crew.

30 in 1566 the i belonged to spain. ii rebelled against spanish rule. iii was in independent country. iv was made up of both catholic and protestant provinces.