A nurse is caring for a client who has a disrupted sleep pattern related to nocturia. Which of the following questions by the nurse is appropriate to collect data about the client's nocturia?

A. Asking about a bedtime routine provides information about sleep hygiene, but it does not specifically address factors contributing to nocturia, such as fluid intake or stimulants. While useful for overall sleep assessment, it is not the most direct question for nocturia. B. Caffeine is a diuretic and can increase urine production, contributing to nocturia and sleep disruption. Asking about evening caffeine consumption directly helps identify modifiable behaviors that exacerbate nocturia, making this question most relevant for collecting targeted data. C. While bedtime affects overall sleep duration, it does not provide specific information about urinary frequency at night. This question is part of general sleep pattern assessment but does not address nocturia causes.