I think it is A for they formed a group to fight the whites.
D!!! Good luck and hope this helped!
The correct answer is Malaria
Malaria was a huge problem since it couldn't be treated and people mostly died from it. It prevented numerous explorers from venturing into places like Africa where Malaria was running rampant due to the huge amount of mosquitoes. When it was discovered, it enabled numerous people to live at ease because they could not live with the disease or prevent getting it.
Plymouth "always remained small. After the founding of the [Massachusetts] Bay Colony, its population declined. When in the 1660s it could count three thousand souls within its boundaries, it was still only one-fourth or one-third the size of the Bay Colony." Powers does not give any source for his population estimate of <span>3000.</span>