Answer: C
Explanation:and also due to the lack of fresh water.
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>
I think pyramid were built way back, because there's a lot of them. Also pyramid were made for a purpose.
Hope this helps!
<span>The Tokugawa Shoguns allowed trade with foreign traders and made large profits
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