Which statement best explains why fur trading had moved to the Pacific Northwest by the late 1700s?

Question

A huge demand for furs had emerged in Africa.
Fur trading had been banned east of the Mississippi.
Customers preferred the quality of Western furs.
Eastern supplies could not keep up with demand.

Answer 1

The statement that best explains why fur trading had moved to the Pacific Northwest by the late 1700s is:

Eastern supplies could not keep up with demand.

By this time, the demand for furs, particularly beaver pelts, had increased significantly in Europe and the eastern United States, leading traders to explore new sources of fur in the Pacific Northwest, where furs were plentiful and could meet the rising demand.