Which of the following helped to increase the populations of northeastern cities

Question

more diversity
successful cotton crops
growth of factories and trade
building of the Erie Canal

i chose building of the erie canal

Answer 1

It could be the canal or it could be the growth of factories and trade. Of course, the canal helped this growth by transporting raw materials to the east and trade to the rest.

Answer 2

The canal brought people from a wide area, increasing diversity.