Write the next sentence in the following story.

How to use an incentive spirometer
Put the incentive spirometer together, if necessary.
If you haven't used the device before, you may need to assemble it. Wash your hands, then remove the pieces from the plastic bags.

OPTIONS:
(A). Run the spirometer under the faucet in the shower. Run the spirometer without checking for leaks..
(B). Stretch out the flexible tubing with the mouthpiece, then connect the side without the mouthpiece to outlet. The outlet is on the bottom right-hand side of the base..
(C). Wait ten to thirty minutes to allow everything time to work completely. Make sure any accessories, buckles, safety pins, or clips have not detached from the viacetone..
(D). Locate the wires that connect the spirometer to the bag. Use the wires from each of the copper connections... The answer should be
(B).