Given the task definition and input, reply with output. 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 refinish bathtubs [title] Clean the entire surface of the bathtub with chemical cleaners to remove any soap scum and dirt residue. [step] The chemical cleaners will also help the bonding agent adhere to the surface. [title] Rinse and dry all surfaces thoroughly. <sep> (A) [title] Use a palm sander to gently roughen the surfaces you plan to refinish to make it easier for the paint to bond with the surface. [title] Tape paper or plastic over any surfaces you do not want to paint. (B) [title] Remove tub counter tops with an acrylic acid based cleaner with a small brush or the brush or spatula. [title] Remove mold, insects, and wax from the tub. (C) [step] Run a vapor bath if needed to remove soap scum or dirt residue from the bathtub. [title] Detach the tub frame by jacking the top part of it upwards and slamming it against the side and wall. (D) [title] Identify and avoid leaking faucets or shower heads, such as those with a drain. [title] Remove the line attaching a shower drain to the faucet.
A