The weekly pay for working a job is given by the function P(h) = 15h, where "h" is the number of hours worked. The company restricts workers to a maximum of 40 hours per week. The tax on the pay is given by the function T(P) = 0.18P, where "P" is the weekly pay. What is the BEST description of the domain for the tax function T(P)? A) {0, 1, 2, 3, ..., 40} B) {0, 15, 30, 45, ..., 600} C) {any nonnegative real number ≤ 40} D) {any nonnegative real number ≤ 600}