While recovering from a severe illness, a hospitalized patient wants to change a living will, which was signed 9 months ago. Which response by the nurse is most appropriate?

"Check with your admitting health care provider whether a copy is on your chart."

"Your living will can be changed only once each calendar year."

"Let me check with someone here in the hospital who can assist you."

"You are not allowed to ever change a living will after signing it."