After Yet Another Patron Dripped Sweat on Her Desk,the Clerk

Multiple Choice

After yet another patron dripped sweat on her desk,the clerk at the gym complained,"It's gross working at a gym,with everyone sweating all the time." "Yes," the manager replied,"and it's probably costing us more for ________,but I'll bet we're saving on ________."

A) towels; heating
B) weight machines; treadmills
C) the water cooler; air conditioning
D) the water cooler; towels