Write the next sentence in the following story.

How to add shelves to a closet
Plan the locations of your closet shelves.
The first step in planning your layout is determining the length of each shelf. Measure the length across the back wall, and subtract about an inch (2.5 cm) from either side where the shelf touches a wall.

Choose from:
A). Measure across the bottom wall, and subtract an inch (2.5 cm) from the sides of the shelf. Decide on a width for each shelf.
B). Next, plan the vertical distance between each shelf. This will depend on what type of objects you want to store.
C). This will be a good reference point when you are deciding where to place your shelves. Try to see how wide your closet shelves reach.
D). This is the length you will need for the shelf. Don't even look at the surface of the wall at this point.. The answer should be
B).