A nurse is assessing a client who has been taking sertraline (Zoloft) for 2 weeks. The nurse should identify which of the following findings as an indication that the medication is effective?

A. While maintaining blood pressure within the expected range is important, it does not specifically indicate the effectiveness of sertraline, which is an antidepressant. B. Weight gain can occur with some antidepressants, but it is not a direct indicator of their effectiveness. C. An increase in mood is a primary goal of treatment with sertraline, and reporting this improvement suggests that the medication is having a positive effect. D. The absence of swollen legs is not a relevant indicator for assessing the effectiveness of sertraline, as it does not relate to mood or depression symptoms.