Question

What effect did the construction of the transcontinental railroad have on coast-to-coast communication?

The railroad made coast-to-coast communication instantaneous.

The railroad reduced coast-to-coast communication time from about a week to about a day.

The railroad reduced coast-to-coast communication time from about 180 days to about a week.

D.The railroad made coast-to-coast communication more complicated.

Answer 1

The railroad reduced coast-to-coast communication time from about 180 days to about a week.

Answer 2

The railroad reduced coast-to-coast communication time from about 180 days to about a week.
The previous means of communication was by horseback, but that took quite some time because of rough terrain, and the horse's and human's need for rest along the way. Trains don't tire, and move much faster than a horse does.