A 68-year-old patient with a history of peptic ulcer disease presents with hematemesis and hypotension. What is the nurse's immediate priority intervention?

Establishing two large-bore IV lines for fluid resuscitation and blood transfusion.

Positioning the patient in a Trendelenburg position to increase cerebral perfusion.

Administering oral proton pump inhibitors to reduce gastric acidity.

Providing the patient with ice chips to reduce nausea and discomfort.