A nurse is assessing an adult client who is receiving morphine via continuous IV infusion. The nurse should identify that which of the following is the priority finding?

A. Vomiting 30 mL of fluid is concerning but not immediately life-threatening in the context of morphine administration. B. Urinary output of 20 mL in 1 hr is low, but it is not as urgent as respiratory depression. C. Respirations deep at a rate of 10/min is a sign of respiratory depression, which is a priority concern in patients receiving opioids like morphine, as it can lead to hypoxia and respiratory failure. D. Blood pressure 90/60 mm Hg is low but not as immediately concerning as respiratory depression in this scenario.