You will be given a definition of a task first, then some input of the task.
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".

[header] How to tile a bathroom floor [title] Purchase tiles. [step] Buy a tile that's durable and aesthetically pleasing to you. Purchase more tile than you'll need. <sep> (A) If you buy tile that's loose, your foot will get caught in a seam, crack, or spout. [substeps] You won't need to buy multiple tiles as they'll only go in one direction. (B) For example, if your bathroom has some large cracks, you'll need enough tiles to cover the crack. [substeps] Check homeowner's manual to see if the tile you buy costs enough to cover the crack. (C) You can buy tile at most art supply stores or at hardware and home improvement stores. [substeps] Go shopping for tile at home if you want to make a mosaic mosaic in your bathroom, or at a local hardware or home improvement store, like lowe's or farrah adams. (D) A good rule of thumb is to get 15% more tiles to account for tiles you may need to cut to fit in narrow spaces and tiles that will break in the shipping process. There are many different types of tile available : [substeps] Ceramic and porcelain tiles cost around a dollar per square foot and are attractive, long-lasting, and durable.
Output:
D