Final answer:
The action not taken by the Office of the National Coordinator concerning EHRs was recommending stricter regulations by the FDA on EHR design and implementation.
Step-by-step explanation:
The answer to the student's question, Which was not a reaction by the Office of the National Coordinator to the anticipated use of EHRs is d. Recommending stricter regulations by the FDA on EHR design and implementation. The Office of the National Coordinator for Health Information Technology (ONC) has focused on efforts to foster the adoption of electronic health records (EHRs) and ensure their usability, as well as their integration into the healthcare system. However, the FDA, not the ONC, is responsible for regulating medical devices, which would include EHR systems if they were to be considered under such regulations. The collaboration with NIST to develop EHR usability measures, overseeing the establishment of Authorized Testing and Certification Bodies, and initiating a panel discussion by the Institute of Medicine on HIT and safety were indeed actions taken by ONC in response to EHR use.