What happens next in this paragraph?

How to clean a spa filter
Locate your filter cartridge.
Oftentimes, you can partially see the filter from the inside of the spa system. It is most often located inside of a canister, cradle, or lid.
Select from the following.
[A]. Modern filters have small holes at the top to allow water to flow through. Remember to unscrew and remove these with a screwdriver.
[B]. If you do not see such a compartment, check your owner's manual to locate the filter. Turn your spa system off before you remove the filter.
[C]. If this is the case, look for the cartridge (near the upper portion of the probe portion) which has a tiny " six-hole " slot in it. You may have to begin turning your device in one direction several times to find it.
[D]. Pay attention to the lining of the cartridge as well. If it has one side only, it's going to be covered in cleaner, which may stain your filter.
[B].