Question

The Mormon Trail, Oregon Trail, Pony Express, and California Trails likely overlap because they all

Answer 1

if you are in usatestprep the answer will be A) followed the same rivers westward.

Answer 2

They used the same trail moving toward the west during their travel but separated when they all reached farther locations in the west where they separated. It wasn't easy for them because diseases like cholera were widespread on their journey that affected the river.