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 butter biscuits [title] Grease an oven tray with the butter. [step] Sprinkle some flour over the butter and shake the tray to evenly coat it. The butter and flour prevents the biscuit dough from sticking while baking. <sep> (A) Then, pour one cup (155 g) of the filling into the tray. [substeps] If you're making a cake roll, include a cup (175 g) of unsalted butter in the recipe. (B) [title] Beat 3 eggs with a whisk. [step] Use both hands to beat together 1 egg with 3 cups (710 g) of flour until smooth. (C) [title] Mix the butter and sugar in a large bowl. [title] Mix two eggs in a small bowl and add the vanilla extract to it. (D) To grease the tray, you can use a biscuit cutter, knife, or the back of a spoon. However, you may need to cut this dough into manageable pieces and spread it out on the tray.
C