Help please

Question

Which statement BEST describes the difference between arithmetic density and agricultural density?

My answer- A.
Agricultural density focuses on people, and arithmetic density focuses on math.

B.
Agricultural density focuses on agriculture, and arithmetic density focuses on used land.

C.
Arithmetic density focuses on numbers, and agricultural density focuses on land availability.

D.
Arithmetic density focuses on people, and numbers and agricultural density focuses on land and mass.

E.
Arithmetic density focuses on people and land, and agricultural density focuses on a specific group of people and land.

What does population distribution and physiological density help geographers do?

A.
gather information about the conditions of different areas

B.
figure out economic differences between different countries

C.
evaluate changes in landscapes across regions in any given country

D. (my answer)
determine how much land is needed to support any given population

E.
account for discrepancies between number of people and available land