Which situation is represented by the equation 100 + 40x = 50x?

A.
Gym A charges $40 per month plus an initial fee of $100. Gym B charges $50 per month. When will a member pay the same total amount at both gyms?

B.
Gym A charges $50 per month plus an initial fee of $100. Gym B charges $40 per month. When will a member pay the same total amount at both gyms?

C.
Gym A charges $40 per month plus an initial fee of $100. Gym B charges an initial fee of $50. When will a member pay the same total amount at both gyms?

D.
Gym A charges $100 per month plus an initial fee of $40. Gym B charges $50 per month. When will a member pay the same total amount at both gyms?