After traveling to a country with a tropical climate, a young adult is diagnosed with a liver abscess and is taking antimicrobial therapy as an outpatient. During a follow-up visit at the community clinic, the nurse observes that the client has developed jaundice. Which action should the nurse take?

A. Instructing the client to increase protein intake is inappropriate, as jaundice may indicate liver dysfunction, which can affect protein metabolism. B. Preparing the client for repeat blood cultures may be necessary if there is suspicion of an infection, but the priority is to assess the liver's function first due to the presence of jaundice. C. Arranging emergency transport to an inpatient facility is not immediately necessary unless the client shows signs of severe distress or complications. Evaluation of liver function is a more prudent first step. D. Explaining the need to evaluate liver function is critical because jaundice indicates a potential liver issue that needs immediate assessment. This evaluation will guide further treatment and management.