Question

how did fur traders help in the westward expansion of the united states?

the fur trade required a large work force to be profitable.

they established forts along the oregon trail that protected settlers moving west.

the trails they established to move their furs east were later used by pioneers.

they worked as scouts, bringing settlers out to the pacific northwest.

Explanation:

Fur - traders blazed trails for moving furs east. These trails became important routes for pioneers during westward expansion. The other options are not the main ways fur - traders contributed to westward expansion. Establishing forts was not a primary role of fur - traders, and they did not mainly work as scouts or require a large workforce that directly contributed to expansion.

Answer:

The trails they established to move their furs east were later used by pioneers.