Although Pearl Harbor was the only military conflict on US soil during WWII, how was every American involved in the war?

Everyone had a role to do.

Explanation:

While the men went off to war, and some women as nurses, most women went and took over the jobs that most guys did. It was a big movement for women, as they used this as equality, allowing them to do what they can to help out.

Every American was involved because they helped save food, make weapons, and contribute to the military. Without the Homefront's help the American military would probably have not succeeded. The Homefront was a big part of the war and helped the US military very much.

d. china

good luck

d is the best choice