A 49-yr-old man has been admitted with hypotension and dehydration after 3 days of nausea and vomiting. Which prescribed action will the nurse implement first?单项选择题

A

Insert a nasogastric (NG) tube.

B

Infuse normal saline at 250 mL/hr.

C

Administer IV ondansetron (Zofran).

D

Provide oral care with moistened swabs.

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