A 52-year-old man with stage 2 chronic kidney disease is scheduled for an outpatient diagnostic procedure using contrast media. Which action should the nurse take? （ ）

A、Assess skin turgor to determine hydration status.
B、Insert a urinary catheter for the expected diuresis.
C、Evaluate the patient’s lower extremities for oedema.
D、Check the patient’s urine for the presence of ketones.