Which answer best explains a reason people wanted to build a railroad across the United States? A. The railroad companies wanted to put the canal builders out of business.

B. The government wanted the route completed before the Civil War started.

C. The railroad companies wanted to prove they could build such a long track.

D. The Gold Rush of 1849 inspired the railroad companies to try to get trains to California.

D

Explanation:

I don't think any of the others make a ton of sense

b. major john c. frémont led a rebellion called the bear flag revolt.

explanation:

during the bear flag revolt, from june to july 1846, a small group of american settlers in california rebelled against the mexican government and proclaimed california an independent republic. the republic was short-lived because soon after the bear flag was raised, the u.s. military began occupying california, which went on to join the union in 1850. the bear flag became the official state flag in 1911.

warfare was the primary means of cultural transmission in both regions.