Final answer:
Therapists at community mental health centers usually charge on a sliding scale based on the client's ability to pay.
Step-by-step explanation:
The subject of this question falls under the category of Health. The question is asking about the charges therapists at community mental health centers apply. The answer to this question is c. on a sliding scale based on the client's ability to pay. Therapists at community mental health centers typically consider the financial situation of their clients and charge accordingly, making their services more accessible to individuals with varying economic backgrounds.