In this task, you are given a context and four options. Each option is a suggested ending for the context. You should read the context and pick the best ending for the context. Please answer with "A", "B", "C", and "D".
Q: [header] How to add molding to cabinets [title] Measure the length of crown molding you will need. [step] Begin by using a tape measure to determine the total length of your cabinet tops. This will determine the total length of crown molding you need to purchase. <sep> (A) [substeps] Its length will depend on the height and depth of your cabinets. You may need up to 4 feet (1.9 m) of cabinet tops for the standard wood crown molding. (B) [substeps] For instance, if you'll be adding 12 boards and frame trim to your cabinet, the base length for your cabinet with trim will be 12 board thickness. If you'll be placing your cabinets on top of a rest rail for a seated couch, you will need 45 board thickness. (C) Subtract 1400 feet (54.19 m) for the crown molding for each cabinet top. This is your total length of cabinet top and it will determine the walls, trim, and countertop molding material that you will use. (D) If this is your first time working with molding, consider buying about 20 percent more length than you need to allow for mistakes and wasted material. [title] Construct a guide fence for use with your miter saw.
A:
D