Dominic is asking his relatives and friends to contribute $2 each to the school library fund. So far he has collected donations from 23 of his relatives. The expression 2(f+23) represents the total amount of money Dominic expects to receive. What part of the expression represents the total number of people that Dominic expects to contribute $2 to his project?

A
f

B
23

C
f+23

D
2f+23