A nurse is preparing to obtain a urine sample from a 7-month-old client. Which of the following collection methods should the nurse identify as yielding the most reliable urinalysis and urine culture results?

A. Clean-catch samples are difficult to obtain in infants and may yield contaminated results. B. Straight catheterization is the most reliable method for obtaining a sterile urine sample in infants, providing accurate results for both urinalysis and urine culture. C. Suprapubic aspiration is another sterile method but is less commonly performed than catheterization. D. A urine collection bag can be contaminated and is less reliable for culture or urinalysis.