What's the function of a cooling tower? Question 15 options: a) It cools the water flowing through it by evaporating a small portion of the water. b) It cools the water flowing through it by using a separate compression refrigeration system. c) It cools the water flowing through it by passing it over ice that's made during low-usage hours. d) It cools the refrigerant flowing through it by evaporating a small part of the refrigerant to the air