Which of the Following Expresses the Correct Order When Working

Which of the following expresses the correct order when working with an invasive pressure monitor?

A) Level the transducer, locate the phlebostatic axis, zero the transducer, and take the reading.
B) Locate the phlebostatic axis, level the transducer, zero the transducer, and take the reading.
C) Take the reading, level the transducer, locate the phlebostatic axis, and zero the transducer.
D) Locate the phlebostatic axis, zero the transducer, level the transducer, and take the reading.