Single/multi-choice problem: Which of the following solutions is better for the following goal:
How can you hold a door on edge?

Pick from: a. Here's a simple way to hold a door on edge when you need to plane it or install hinges or a lock. Just make a "V" from two lengths of scrap wood, joining them with one screw. Then screw each piece of wood to the top or bottom of the door, as shown; the horizontal piece should be slightly longer than the angled piece. b. Here's a simple way to hold a door on edge when you need to plane it or install hinges or a lock. Just make a S from two lengths of scrap wood, joining them with one screw. Then screw each piece of wood to the top or bottom of the door, as shown; the horizontal piece should be slightly longer than the angled piece.
a.