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 make brownies in a mug [title] Use a clean, ceramic, microwave-safe mug. [step] It shouldn't have any metal on it. In general, a simple, unadorned ceramic mug is going to work the best. <sep> (A) [title] Pour the brownie batter into the mug. [step] Do this a few times while you're waiting for your brownies to rise on top. (B) [substeps] Scoop a good amount of the batter into the mug. If you try to use the mug from the bottom and the bottom of the mug did not fill it up yet, you won't be able to fill it up fully and get the brownies moist. (C) [title] Mix up the 1/4 cups flour/sugar, and 2 tablespoons cocoa in a mug. [step] Take the dry ingredients and blend them up well. (D) [title] Cut the round, hollow side out of the mug. [step] Use a sharp kitchen knife or kitchen spatula to carefully cut the round, hollow side down.
C