Final answer:
The continuing healthcare trend from the second half of the 20th century to today is telemedicine, which utilizes technology to remotely deliver healthcare services and improve access and efficiency.
Step-by-step explanation:
The trend in healthcare delivery that began in the second half of the 20th century and continues today is c) Telemedicine. Telemedicine represents a shift towards leveraging technology to provide medical care, often remotely, to improve efficiency and access to healthcare services. This practice has grown significantly, particularly in response to the challenges presented by an aging population, an increased need for healthcare services, and advancements in communication technology. Using telemedicine, healthcare providers can consult patients via videoconferencing, remotely monitor patients' health, and provide services that historically required an in-person visit, thereby reducing the barriers to accessing medical care.