Question

Suppose you have the job of assigning the proper number of House of Representatives seats for various

Answer 1

I'm just assuming that D is supposed to be "population", so, the answer would be D.

Answer 2

Suppose you have the job of assigning the proper number of House of Representatives seats for variousstates. To do that, you must know the population in that state.

Because 'number' would refer to the number of people, as in population.