A nurse is caring for a client who has an arterial line inserted in the radial artery. Which of the following actions should the nurse take?

A. Infusing 0.9% sodium chloride at 150 mL/hr is excessive and not appropriate for maintaining an arterial line. A slow, continuous infusion (usually 3–5 mL/hr) with heparinized saline is used to keep the line patent. B. The pressure bag attached to the arterial line should be maintained at 300 mm Hg to prevent blood from backing up into the tubing and to ensure accurate pressure readings. C. The transducer should be aligned with the phlebostatic axis (level of the right atrium, at the fourth intercostal space, mid-axillary line), not the radial artery, to ensure accurate readings. D. Asking the client to bear down (Valsalva maneuver) is not appropriate when measuring blood pressure via an arterial line and could distort results or stress the client.