Which led western emigrants to california in the 1840s? a. california trail b. oregon trail c. santa fe trail d. sierra nevada trail

A)Oregon Trail

The California Trail is a long train rail that connectedpart of the towns that were in the missouri river and when it started it followed the same trails as the Oregon Trail, when the gold rush started in 1848 half the male population from Oregon left for California, this boosted the Oregon Economy.

to protect the united states' role as a world leader, president truman wanted to prevent the soviet union from spreading communism beyond its post-world war ii boundaries. he declared that the united states must assist any nations struggling to prevent a communist takeover.