Read this sentence from the text:


The Pony Express was the first rapid transit and the first fast mail line across the continent from the Missouri River to the Pacific Coast.


What does this sentence imply about the period in which the Pony Express developed?:

AThere were no trains that went to the Pacific Coast.

BThere was little need for rapid transit before the war.

CPrevious forms of transit to the West did not include mail.

DThere was little need to cross the continent before the war.