B. and E. marked the downfall of the Inca empire, for obvious reasons. Disease and civil war would obviously kill the empire, and taking an important leader would also mark great chaos within the empire. A. and C. are not to be ignored however, considering that maintaining peaceful relationships with the Spaniards only brought death and chaos to the Aztecs, all from the Spaniards.
On June 29, 1892, workers belonging to the Amalgamated Association of Iron and Steel Workers struck the Carnegie Steel Company at Homestead, Pa. to protest a proposed wage cut. ... The Homestead strike led to a serious weakening of unionism in the steel industry until the 1930s.
Francis Bacon also Rene Descartes were responsible for developing the five-step scientific theory during the Scientific Revolution.
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Both Gregor Mendel and Alfred Wegener proposed ideas that were not accepted completely by the scientific community during their lifetimes. They had common ideas. They were presented by amateur scientists who were not accepted by the scientific community.
The answer would be letter A.