When did the human population doubled from 2 billion to 4 billion?

What does the fall of the bastille represent? ?

What are the winter holidays the annex residents celebrate? a. chanukah and st. nicholas b. st. nicholas and new year's c. christmas and kwaanza answer if your a 100% percent sure ^-^

Which describes a significant different between the north and the south in the year leading up to the civil war