Final answer:
The correct answer is C. "I will be careful not to gain too much weight while taking this medication."
Step-by-step explanation:
The correct answer is C. "I will be careful not to gain too much weight while taking this medication." This statement indicates understanding of the teaching for a client with schizophrenia and a new prescription for iloperidone. Weight gain is a common side effect of antipsychotic medications, including iloperidone. By expressing a concern about weight gain and stating the intention to be careful, the client demonstrates an understanding of the potential side effect and the need to monitor their weight while taking the medication.