The cost, C (t) in dollars, of renting a carpet cleaner is a function of t, the number of hours you have it in your possession. Which of the following is a correct interpretation of the statement C (5) = 42 ? (A) It costs $42 to have the machine for 5 minutes. (B) It costs $5 to have the machine for 42 minutes. (C) It costs $42 to have the machine for 42 hours. (D) It costs $42 to have the machine for 5 hours