MJ comes to a pharmacy and requests a transfer of a prescription for Alprazolam from another pharmacy. His patient profile shows that three eligible refills have been left on the prescription. If both pharmacies, transferring and receiving, electronically sharing a real-time, on-line database, how many times may the original prescription be transferred between pharmacies?

a. One-time only
b. Maximum three times
c. As many times as needed until prescription expires
d. Cannot be transferred