How did westward expansion affect the population of the north?

a) the population increased.

b) the population declined.

c) the population stayed the same.

d) no record of population was kept at this time.

I believe the answer is B. Because with the Louisiana Purchase now belonging to America, most people of the North moved West to claim new land

I might be wrong so sorry!

answer; gender,race,age,/// (d) all of these;