Answer:
"This civilization is known by many names: Ancient India, Indus Valley, and Harappan Civilization. Historians and archeologists believe the Indus Valley Civilization began around 3000 BCE. There is evidence of trade between Ancient India and Mesopotamia as early as 3200 BCE."
Explanation:
Scarce vegetation in those regions
Big Bang was 13.8 million years ago
Scientific Theory is C
Evidence of Big Bang might be B
They believe global warming is caused by an increase in levels of carbon dioxide.
