Detailed Explanation:

Electronic health records (EHRs) provide real-time, individualized patient information, including medical history, medications, and discharge instructions, which are essential for educating heart failure patients effectively.

Option C: Electronic health records

EHRs can offer tailored information, such as medication instructions, symptoms to monitor, and lifestyle advice, specific to each patient.

Other Options:

Insurance claims data, satisfaction surveys, and registries do not provide patient-specific information needed for immediate educational interventions at discharge.