The nurse at a community mental health center has been coordinating the care of a client with anorexia nervosa. The 5' $3^{\prime \prime}$, 16-year-old adolescent has maintained her weight at $110 \mathrm{lb}(49.9 \mathrm{~kg})$ for 6 months. This week, the client appears tired. Her weight has dropped to $104 \mathrm{lb}$ (47.2 kg). Her laboratory test results reveal a potassium level of 2.3 $\mathrm{mEq} / \mathrm{L}$ and a hemoglobin level of $12 \mathrm{mg} / \mathrm{dL}$. The client states that she has been depressed, restricting foods, and using laxatives. Which of the following would the nurse do next?
a. Ask the social worker involved in the client's care to arrange home visits.
b. Call the physician to prescribe antidepressants and potassium supplements.
c. Notify the physician of the findings and the need for inpatient care.
d. Develop a contract that outlines consequences for dieting and using laxatives.