A cell phone company charges a one-time activation fee, as well as a monthly service charge for a cell phone plan with unlimited minutes and data. The total cost is modeled by the function C(x) = 99 + 85x. Which statement represents the meaning of the function?

A. C(x) is the total cost, xis the number of months of service, $85 is the one-time activation fee, and $99 is the service charge per month.
B. C(x) is the total cost, x is the number of months of service, $99 is the one-time activation fee, and $85 is the service charge per month.
C. x is the total cost, C(x) is the number of months of service, $99 is the one-time activation fee, and $85 is the service charge per month.
D. x is the total cost, C(x) is the number of months of service, $85 is the one-time activation fee, and $99 is the service charge per month.