The Astoria Park Community Pool sells season passes for $105 each. This season, they can sell up to 500 season passes. The function S(n) represents the amount of money the pool makes from selling n passes this season. What is the domain of S(n)?
a. all whole numbers less than or equal to 52,500
b. all multiples of 105 from 0 to 52,500
c. ail multiples of 105
d. all whole numbers greater than or equal to 105