Files D Question 16 2 pts The size of a given population depends on all of the following factors except: birthrate life expectancy 0 0 citizenship immigration Question 17 2 pts Regarding the distribution of income throughout the United States: half of the population has an income of less than $80,000 annually the average income of some 20,000 Americans is $3 million it is uneven and has become more polarized retailers such as Neiman Marcus and Bloomingdale's target all income groups