Which tribe of indians actually gained strength as a result of their contacts with whites?

The correct answer to this open question is the following.

The tribe of Indians that actually gained strength as a result of their contacts with whites were the Iroquois.

One of the most important Native American Indian tribes in colonial America was the Iroquois. It was a form of a confederacy of many tribes in the Northeastern territories. They were the Seneca, Onondaga, the Mohawk, Oneida, and Cayuga. Their system of government was interesting because they already had a representative form of government where officials were elected. These tribes strengthened their presence with the arrival of colonists.

b.

jim crow laws were enacted in northern states.

it allows shippers to carry commercial goods, which allows them to save time and money.