Question

What permitted transportation in the early years of the United States? Erie Canal Mississippi–Missouri River System Pony Express Transcontinental Highway

Answer 1

I believe the answer is Mississippi-Missouri River System.

Answer 2

Mississippi-Missouri River System

Step-by-step explanation:

The transportation on Mississippi–Missouri River System started around the early period 1800s with the use of Steam Boats. It spans across 5,969 km long.

Erie canal first use was in 1821

Pony Express was a mail service

Transcontinental Highway in America first became operational in 1954

Hence, in this case, the correct answer is Mississippi-Missouri River System