Answer:
Providing supplies to American and Allied troops fighting the war in Europe, Africa, and the Pacific required the efforts of all Americans. At home, citizens contributed to the war effort by rationing consumer goods, recycling materials, purchasing war bonds, and working in war industries. At home, buying war bonds or savings stamps was probably the most common way to support the war. When people bought a bond or a savings stamp, they were lending money to the government. Their money would be paid back with interest after the war
They became known as boers. sorry for late response
The correct answer is d. hunting -gathering.
Hunting and gathering was already existing before this : in fact the neolithic revolution was going away from this lifestyle and starting farming and domestication of animals.