Because when the natural rubber supply from Southeast Asia was cut off at the beginning of World War II, the United States and its allies faced the loss of a strategic material. <span> So the companies, in collaboration with a network of researchers in government, academic, and industrial laboratories, developed and manufactured in record time enough synthetic rubber to meet the needs of the U.S. and its allies during World War II.</span>
The answer I belive for #10 is B. voting in eletions and
#11 is C. it elimanated the quota system
"a. advanced political organization" was not a broad trend from 8000 to 600 BCE, due mostly to the fact that this didn't happen under labor became far more specialized, along with more advanced trade.
It completely devastated the Confederacy. Many plantations, homes, and businesses were destroyed and/or burned down. Everything from supplies to food was raided. It also greatly depleted Southern morale.
