Final answer:
Residents must have access to their medical records within 14 days of a written or oral request, according to the HIPAA regulations.
Step-by-step explanation:
The timeframe in which a resident must have access to his/her medical records upon written or oral request is b. 14 days. Health regulations ensure that patients have the right to access their personal health information to maintain transparency between healthcare providers and patients. The 14-day period is the standard timeframe established by the Health Insurance Portability and Accountability Act (HIPAA) for covered entities to respond to a request for access to medical records.