Final answer:
Medical offices use Priority Mail Express for sending medical records, receiving lab results, and mailing prescriptions to ensure prompt patient care and meet legal compliance.
Step-by-step explanation:
Medical offices may use Priority Mail Express for several time-sensitive tasks that require quick delivery to ensure efficient patient care and legal compliance. These tasks include sending medical records, which is crucial when coordinating patient care among different healthcare providers or transferring patient information. It is also used for receiving lab results rapidly, allowing healthcare professionals to make timely decisions about patient treatment options. Additionally, Priority Mail Express is employed for mailing prescriptions, ensuring that patients have access to necessary medications without delay. Therefore, the correct answer is 4) All of the above.