Answer:
B: Bronze
Explanation:
Because this brought humans into the bronze/copper age. And bronze is a copper and tin alloy
In the late 1940s, the United States responded to the growing threat presented by the Soviet Union by trying to stem the tide of Communism by supporting and propping up governments that opposed Communism.
A majority had been farmers in Germany, and most came seeking economic opportunities. A few dissident intellectuals fleeing the 1848 revolutions sought political freedom, but few, save perhaps the Wends, came for religious freedom. The German settlements in Texas reflected their diversity.