An employee works for a courier company and is paid $12 per hour. The employee works between 52 to 125 hours every month. The function P (n) = 12n represents the amount paid to the company’s employees for n hours of work. What is the domain of the function?
A. all real numbers
B. 12 ≤ n ≤ 52
C. 12 ≤ n ≤ 125
D. 52 ≤ n ≤ 125