Instructions: 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 build a dog house [title] Consider what you'll be using the base for. [step] Different dogs have different needs, but almost every dog will need the following: an insulated, dry space that he can call home whether it's hot or cold. Pay attention to these factors when building a dog house : [substeps] Think about insulation. <sep> (A) Remember that the base builds the foundation for the whole house and creates a space of air between the ground and the floor that acts as insulation for the house. A house without a base is cooler during the cold months and warmer during the hot months. (B) Dogs are very sensitive to sunlight and it can take up to four years before a dog's house warms up completely. In addition, dogs with cones are more suitable for dens or sheds because of their sensitive skin and introverted personality. (C) Dogs love dry weather and are notorious for overheating. What you decide to use is up to you. (D) Dogs love warm spaces, so they can grow warm inside a house if the house is just low enough. If it's hot, consider covering the bottom of the house with individual shingles or hammering along the edges.
Output:
A