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".
Q: [header] How to bake a vanilla mirror glaze cake [title] Preheat oven to 400 degrees fahrenheit or 204 degrees celsius. [title] Spread butter onto an eight-inch cake pan with a silicon spatula. [title] Whisk the flour, baking powder, and salt in a large bowl. <sep> (A) [title] Add the butter one teaspoon at time, while mixing with an electric mixer, at low speed, until cup of butter is added. [title] Keep the blender on as you slowly add the sugar to the mixture. (B) [title] Mix the wet ingredients into the dry mixture at the base of each bowl. [title] Pour about 6 ounces (133 g) of the glaze over the wet mixture, then fold in the dry mixture. (C) [title] Pour the butter into one or two smaller bowls. [title] Sift the sugar and salt into the small bowl. (D) [title] Pour dry ingredients into the pan , 1 cup at a time. [title] Roll a little wax mix into the dry ingredients.
A:
A