The equation below describes the relationship between the number of months (x) since Johnny began paying for a cell phone plan and the total amount of money (y), in dollars, that Johnny has paid to the P-mobile company. y = 15x + 30

Which statement describes a solution of the equation based on the number of months that Johnny has paid his cell phone bill?

A. After exactly 16 months, Johnny has paid $240.

B. After exactly 240 months, Johnny has paid $16.

C. After exactly 16 months, Johnny has paid $270.

D. After exactly 270 months, Johnny has paid $16.