The charge nurse observes an unlicensed assistive personnel (UAP) preparing to use a standard sized blood pressure cuff to measure the blood pressure of an adult client with thrombocytopenia. Which action should the charge nurse take?

Ask the client's primary nurse to measure the vital signs rather than the UAP.

Observe the technique of the UAP in measuring the client's blood pressure.

Advise the UAP that the client is at risk for excessive bleeding and bruising.

Instruct the UAP to use a smaller blood pressure cuff to prevent injury.