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Your answer is c i literally had this same question and got it right
D - Shatytowns of temporary homes for homeless people were Hoovervilles.
Hooverville's were named after President Hoovers since he was the US president at the start of the Great Depression.
I think A. They were determined to make their invention work properly.
The Hittites were allegedly the first society who used chariots as war machines with javelinists or bowmen which enabled them to win battles as such a war device wasn't in use at the time by other nations. However, there has been some dispute whether the Hittites were actually the first society who used chariots as a means of war.
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Not to be that type of guy, but you have asked so many questions to the point other people are literally doing your own homework...