Final answer:
According to federal law, a prescription for Klonopin, which is a controlled substance, can be transferred over the phone only once, and this is only if the pharmacies involved share an online database.
Step-by-step explanation:
Under federal law, specifically the Controlled Substances Act (CSA) enforced by the Drug Enforcement Administration (DEA), a prescription for a controlled substance like Klonopin (clonazepam) can be transferred only once, and only if the pharmacies share a real-time, online database.
If the pharmacies do not share such a system, the transfer cannot be done. It is important to note that the transfer of electronic prescriptions for controlled substances (EPCS) is subject to both federal law and the laws of the state in which both transferring and receiving pharmacies are located.
correct option a) Once