Answer:
On which of the following trails would pioneers use to reach the Southwest?
Oregon Trail
Santa Fe Trail
California Trail
Step-by-step explanation:
The route of Oregon, was one of the main routes of migration by earth of North America, that left from several places in the Missouri river and arrived until the Territory of Oregon.
The first to use the route were, by 1820, the fur traders, followed by missionaries, military expeditions and some groups of civilians from the 1830s.
The answer is: The Oregon Trail.