Final answer:
The option not listed as a barrier to mental health treatment is 'd. being a member of the ethnic majority'. Barriers typically include fears about treatment, language barriers, and difficulties with transportation, while being in the ethnic majority is not a recognized barrier.
Step-by-step explanation:
The option that was not listed as a barrier to mental health treatment is d. being a member of the ethnic majority. Barriers to mental health treatment often include fears about treatment, language barriers, and transportation difficulties. These elements can prevent individuals from seeking or receiving adequate mental health care. On the other hand, being a member of the ethnic majority does not typically constitute a barrier to mental health services. Instead, it is often the ethnic minorities who face additional challenges in accessing mental health care due to factors like stigma, cultural mistrust, and lack of culturally competent providers, as evidenced by extensive research including Gary (2005) and Snowden (2001).