They thought that non-Aryans were inferior, specially Jews. They thought that only the strongest of the race will survive and others will perish. They thought that for Aryans, it was necessary to kill all non-Aryans. This concept was borrowed from the scientific theory that says something like this about species of animals. It is important to note that the theory never mentions "human races". They misunderstood the theory (or acted like they misunderstood the theory). They thought that Aryans were the best "race".
B. the river helped make the harappan people good swimmers and sailor
C. Benin prospered because of the slave trade with Portugal
The answer is b) mobilized
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In 1773, a group of Massachusetts colonists disguised as Mohawk Indians board three British tea ships moored in Boston Harbor and dump 342 chests of tea into the water, so b 342.