Jackie Returns to the Ward

Jackie returns to the ward. She is to have a morphine infusion to deliver pain relief via a syringe driver. You note that the order is for 45 mg of morphine in 60 ml of fluid. You assist the registered nurses to set up this infusion.
-Subcutaneous Heparin 6000 units is to be given, using an 0.5 ml insulin syringe. Stock is 5000 units/0.2 ml, so the volume required is

A) 0.18 ml
B) 0.24 ml
C) 0.27 ml
D) 0.29 ml