The answer is D. The Gupta empire
Answer: it dropped almost by 10%
Explanation:
America's involvement in World War II had a significant impact on the economy and workforce of the United States. Our involvement in the war soon changed that rate. American factories were retooled to produce goods to support the war effort and almost overnight the unemployment rate dropped to around 10%.
Answer:
B. to keep invaders out
Explanation:
The wall was built to help keep out northern invaders like the Mongols. Smaller walls had been built over the years, but the first Emperor of China, Qin Shi Huang, decided that he wanted a single giant wall to protect his northern borders.
D. The elimination of social distinctions between the middle and working class.