The local gym is offering this new promotion: An enrollment fee of $25 and a monthly fee of $15. Which of the following expressions represents the cost of the gym membership for m months?

A. 25 + 15
B. 25 + 15m = c
C. 15 + 25m = c
D. 15 + 25m

C. 15 + 25m = c

The correct expression that represents the cost of the gym membership for m months is:

C. 15 + 25m = c

This expression accounts for the initial enrollment fee of $25 and the monthly fee of $15 multiplied by the number of months (m).