What information must be included in a breach notification?

The correct choice outlines essential components that must be included in a breach notification as specified by HIPAA regulations. This choice emphasizes the need for a thorough description of the breach itself, which allows affected individuals to understand what occurred. Additionally, specifying the type of information involved is crucial as it helps individuals assess their risk level and understand the potential impact on their personal and sensitive data.

Moreover, providing steps individuals can take to protect themselves is a critical element of the notification. This empowers those affected to take proactive measures to safeguard their information against potential identity theft or misuse, thus aligning with HIPAA's overarching aim to protect patient confidentiality and security.

In contrast, the other choices do not adequately cover the necessary details that must be communicated. Simply listing names involved does not provide enough context for individuals to grasp the situation. Mentioning only the date of the incident fails to inform individuals about the scope and nature of the breach, which is vital for their awareness and protective actions. Lastly, while the results of an internal investigation can be informative, they are not mandatory to include in the notification and do not address immediate concerns of affected individuals regarding their personal information.