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 cure nail fungus [title] Look for a white or yellow spot under your nail. [step] This is the first sign of a fungal infection. It may appear under the tip of your nail. <sep> (A) As the infection takes hold, the discoloration will spread and your nail will become thicker and crumbly on the sides. [substeps] Your nail may also be distorted in shape. (B) It might also be on your bottom nails. [substeps] Keep in mind that fungus can develop from overexposure to chemicals, such as ammonia and detergents. (C) It can then spread up into the surrounding tissue. The fungus will spread to your nails as well! [title] Check for an ivy stain on your nail. (D) [title] Feel for tiny bumps on your nails. [step] These bumps can be the result of fungus or other bacteria.
Output:
A