Question

How did the construction of the Erie Canal improve transportation in the United States in the 1820s? The canal connected the Great Lakes to the Ohio River. The canal connected the Great Lakes to the Atlantic Ocean. The canal connected the Atlantic and Pacific Oceans. The canal connected the Great Lakes to the Mississippi River.

Answer 1

Answer;
The construction of the Erie Canal improved transportation in the United States in the 1820s in that the Canal connected the Great lakes to the Atlantic Ocean.

Explanation; 
The Erie canal, opens, connecting the Great lakes with the Atlantic Ocean via the Hudson River. 
It traversed 363 miles from Albany to Buffalo and was the longest artificial waterway and the greatest public works project in North America. 
The Canal served a major importance an it made the US richer and stronger young nation; For example the canal was a major importance in Michigan history since it greatly facilitated the transportation of passengers and freight between the eastern seaboard and Michigan ports. Among other advantages.

Answer 2

The correct answer is the second option. 

Since the Erie Canal stretches across New York State (from Albany to Buffalo), it does not connect to the Ohio River (in Ohio), to the Pacific Ocean (on the other side of the country), or to the Mississippi River (in Mississippi).