What was the prevailing economic challenge the United States faced at the start of World War II?
I really need help with this one, i use plato/edmentum, so if you have the answerr.. ^-^

The correct answer is filling military supply orders

The main transformations perpetrated in the country during the period  from 1939 to 1945, marked by the war economy, but whose effects  overflowing purely military boundaries, contributing to the rise of United states  as the most powerful nation on the globe.

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).