I need the answers please help

The correct answer is D. Lewis and Clark brought back a mapped route to the Pacific Ocean.

Explanation

Meriwether Lewis and William Clark were two American expeditionary who stood out for crossing from the east Coast to the western coast of the United States. The beginning of their journey began in May 1804 and lasted until September 1806, the year in which they reached the coast of the Pacific Ocean. The main objective of this expedition was the exploration of the newly acquired Louisiana (1803). In addition, the purpose of knowing the fauna and flora of this region of North America that had been very little explored was added. So the correct answer is D. Lewis and Clark brought back a mapped route to the Pacific Ocean.

by improved communication.

united states reinforcements contributed greatly to three allied victories in france at: cantigny (first major american battle), argonne (the largest in the united states military history, involving 1.2 million american soldiers), and château-thierry (one of the first actions under general pershing).