Which statement compares HL7 v2 and FHIR in terms of interoperability and modern adoption?

• A. HL7 v2 is modern and web-based; FHIR is older and less adopted
• B. HL7 v2 and FHIR are identical in data structure and adoption
• C. FHIR is older and less interoperable than HL7 v2
• D. HL7 v2 is older and widely used for messaging; FHIR is modern, web-based, and easier to implement

Answer: (D)