Why does zinn suggest are the real reason the u. s entered the war

Ineed a summary over thurgood marshall ! me

What is the evidence that depression can be linked to genetic as well as environmental factors? a. all individuals in similar stressful environments do not experience depression. b. all individuals with the gene variation tied to depression do not experience depression. c. individuals with a combination of environmental stress and gene variation are more likely to experience depression d. all of the above select the best answer from the choices provided оа 0 0 0

How did the us change it’s economy to provide supplies for the war effort?