A nurse is preparing to administer 0.9% sodium chloride (0.9% NaCl) 1,000 mL IV to infuse at 125 mL/hr. The drop factor of the manual IV tubing is 15 gtts/mL. The nurse should set manual IV infusion to deliver how many gtts/min. (Round to the nearest whole number)

A) 9 gtts/min
B) 13 gtts/min
C) 15 gtts/min
D) 21 gtts/min