Prioritize the Procedure Employed to Directly Measure Right Heart Pressures

Prioritize the procedure employed to directly measure right heart pressures, using a catheter. (Enter the number of each step in the proper sequence; do not use commas or spaces.)
A) Insert the catheter into a large vein.
B) The catheter is connected to a transducer.
C) The catheter is advanced into the inferior vena cava and right atrium.
D) The catheter is threaded into the subclavian vein.