Which of the following best describes the relationship between trade-offs and opportunity costs?
a
trade-offs occur when there are no opportunity costs.
b
trade-offs lower the opportunity costs of an economic decision.
c
opportunity costs are the opposite of trade-offs.
d
opportunity costs are incurred when trade-offs are made.

the picture is not clear

explanation:

the option which was not a function of missionaries in the northwest was the first one - they established posts for trading furs and other goods.

missionaries were sent around the world to spread religion and their knowledge and others - they were not merchants who sold furs and other goods.

powerful warriors rose to become chiefs, who had a privileged place in society.