We can calculate that a country would lower its arithmetic density by
A. Increasing the size of its population
B. Increasing the amount of agricultural land
C. Limiting the size of the population
D. Limiting the number of farmers
E. increasing the areas of its urban centers.

C.

Explanation:

Hi, fellow AP Human Geographer. Basically, all that arithmetic density means the total number of people per unit of land area. Having said that, we can immediately eliminate A. because increasing the population would only increase the total number of ppl. per unit of land area. Next, B. B can work, theoretically; however, there is a better answer. Next, D. D. says limiting the number of farmers; while this will technically reduce the number of ppl. per unit of land area, again there is a better answer. Next, E. I'd say this is the toughest choice; however, by increasing the area of urban areas, it can end up attracting more people instead. Overall, the best answer would be C., limiting the size of the population.