Answer:
Many scholars believe that the collapse of the Indus Valley Civilization was caused by climate change. By 1800 BCE, the Indus Valley climate grew cooler and drier, and a tectonic event may have diverted or disrupted river systems, which were the lifelines of the Indus Valley Civilization.
Explanation:
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In ancient times, the number three<span> was sometimes associated with Pluto,the god of death. In this play, it serves as a sort of "heads up" that something bad is coming.</span>
I would say A and B are correct.
The answer is C. As new colonists and explorers discovered the Americas, they also brought disease. This heavily impacted the American Indians as a majority of their population suffered from epidemics.