The answer would be a. spoken and written language because without a solid understanding of this it would be hard to verbally communicate, thus making this the best choice out of the four.
Answer:
It affects them poorly because the new people bring new illnesses and kill their food for the hide. The natives were also killed by the new people.
Sorry if uncorrect
Explanation:
pls give brainlist
B is the correct answer since it is a friend
