Final answer:
The nurse's most therapeutic response to the client's concern about their sleeping habits is to reassure them that everyone has a different biological clock and as long as they are sleeping and functioning well, their sleep pattern is not abnormal or unhealthy.
Step-by-step explanation:
The nurse's most therapeutic response to the client's concern about their sleeping habits would be option D: Everyone has a different biological clock that controls his or her sleep cycle. As long as you are sleeping and functioning well, your habit isn't abnormal or unhealthy.
The nurse should reassure the client that there is variation in sleep-wake cycles among individuals and that sleeping during the day and being awake at night is not necessarily unhealthy or abnormal. By acknowledging the client's concerns and providing an explanation based on biological differences, the nurse can help alleviate the client's worries. It is important for the nurse to provide accurate and empathetic information to address the client's concerns.