An adult panda bear must eat at least 30 pounds of bamboo in a day. There are 12 adult pandas living in part of a bamboo forest.

How many pounds of bamboo, at minimum, must be available each day in order to support the population of In a given year, which would result in the greatest increase in population size?

high birth rate, high death rate, high immigration, high emigration
high birth rate, zero death rate, high immigration, zero emigration
zero birth rate, low death rate, zero immigration, low emigration
zero birth rate, zero death rate, low immigration, high emigration?