Final answer:
An internal barrier to seeking help for mental health is the mistrust of the health care system, which can come from personal or cultural experiences and history.
Step-by-step explanation:
An internal barrier to seeking help for mental health is one that originates within the individual. In the options provided, an example of an internal barrier is mistrust of the health care system. This mistrust can be deeply rooted in personal experiences, cultural beliefs, or historical events that have shaped individuals' or communities' perceptions of healthcare providers. For instance, studies show that African Americans may experience this form of internal barrier due to historical episodes of medical exploitation, such as the Tuskegee Experiment, and ongoing discrimination in the healthcare system. Internal barriers, like cultural mistrust, can prevent people from seeking necessary care and must be addressed to achieve equitable access to mental health services.