The nurse is assessing a client with gallstones for jaundice. Which action should the nurse perform to confirm this information?

A. Review recent serum bilirubin levels: This is an indirect confirmation but not part of a physical assessment. B. Assess conjunctival sacs of lower lids for pallor: This checks for anemia, not jaundice. C. Observe the client's urine for dark orange color: This may suggest jaundice but is not definitive or diagnostic. D. Examine the client's sclera for icterus: Scleral icterus is the most reliable physical sign of jaundice and directly reflects elevated bilirubin levels.