Well i found the choices that u left out and the answer should be letter choice d
(Beginning in the mid 1500's Spanish laws allowed Africans but not indigenous peoples to be enslaved though in practice both groups continued to be treated poorly by Spanish colonist)
I believe the correct answer is the vikings.
Hope it helps!
The Boston massacre was partially the colonists fault because they were harassing the British soldiers by throwing, sticks, rocks and snowballs at them. The soldiers panicked and many accounts say that they heard someone yell fire.
Hope this helped! If you have any questions please ask!