Doctor Casey's Medication Orders for Her Patient Indicate That the Route

Doctor Casey's medication orders for her patient indicate that the route of administration is IVPB.What does IVPB mean?

A) The medication can be given by IV or by mouth.
B) The medication should be administered via a new port.
C) The medication should be piggybacked on the IV.
D) The medication can be given by IV only if the patient prefers this method.