An amusement park charges $20.00 for a souvenir cup and $0.25 for refills all season long. Which function represents the total cost of n numbers of refills, and what is the initial value?

A. y = 20 + 0.25n
The initial value is $0.25.

B. y = 20 + 0.25n
The initial value is $20.00.

C. y = 0.25 + 20n
The initial value is $20.00.

D. y = 0.25 + 20n
The initial value is $0.25.