Definition: 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".
Input: [header] How to test for mold [title] Look for telltale characteristics. [step] Mold often has a fuzzy appearance but can also look like a stain if it's growing on a wall or furniture. Its most common colors are black green, brown, or white. <sep> (A) Mold can feel like cotton, leather, velvet, or sand paper. It usually gives off a musty or earthy odor. (B) It's also likely to clump up on dark windows and drapery. Remember that mold is a brown, mold-defined shape that spreads from ceiling to window in turns. (C) If mold is coming from behind the bathroom mirror, you may have mold on your mirror. You can tell if mold is coming from behind the bathroom mirror by making a loud noise while moving around and scratching at your mirror. (D) If the mold grows on a wall, look for the following : [substeps] Purple. White discoloration or abnormalities on the wall.
Output:
A