Which of the following factors affect population growth?
a. fertility rate
c. net immigration
b. life expectancy
d. all of the above select the best answer from the choices provided a b c d

idk but found this on google

"the kansas-nebraska act allowed each territory to decide the issue of slavery on the basis of popular sovereignty. kansas with slavery would violate the missouri compromise, which had kept the union from falling apart for the last thirty-four years. the missouri compromise had prevented this from happening since 1820."

good question. i'll be looking into that. (this is a joke sir)