An IV is prepared to deliver 1.40 L of a saline solution to a patient with a drop factor of 80.0 gtt/ml and a drip rate of 120.0 gtt/min. How many hours will it take to deliver all of the solution?

a) 1.75 hours
b) 2.25 hours
c) 1.50 hours
d) 2.75 hours