Multi-choice problem: Continue writing the next sentence in this paragraph:

How to make a pvc pipe drum
Use pvc pipe for the drum body.
Green drain pipe about 9 inches (22.9 cm) long and 6.5 inches (16. 5 cm) wide. Or 6 " id (inside diameter) works nicely.

[I] If using green pipe, cut two fingers off one long piece of pipe or approximately 6 " id (inside diameter) (inside diameter) length cut off the other piece of pipe. Measure out the length you want, then place the two pieces together..
[II] Then fill pipe opening with pipe stopper stopper. Sealing pipe opening must be reinforced with marine metal to prevent leaking..
[III] Cut the pipe to length or have the hardware store do this for you. Making sure that the cuts are straight and smooth..
[IV] Cut off all the pipe by hand. You can cut off more, but make sure you cut enough to cover the bottom of the drum..
[III]