Charles Darwin’s theory of evolution as written in his book On the Origin of Species determined that

Charles Darwin's theory of evolution as written in his book On the Origin of Species determined that living things evolve and change through natural selection, and the strongest traits survive over time.

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.