Which Aspect of Intravenous (IV)therapy Could the Nurse Safely Delegate

Which aspect of intravenous (IV) therapy could the nurse safely delegate to the unlicensed assistive personnel (UAP) ?

A) Changing the IV site dressing on the patient's left hand
B) Watching the IV insertion site of the patient who complained of pain at the site
C) Reporting patient's complaints of pain or leakage from the IV site when bathing the patient
D) Replacing patient's IV solution when bag runs dry if it is only D₅W,without medications added