You will be given a definition of a task first, then some input of the task.
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 jam thumbprint cookies [title] Preheat the oven to 350 f (177 c). [title] Sift the flour. [step] Sieve the self-raising flour into a large bowl. <sep> (A) [title] Add the butter or margarine. [step] Get your butter or margarine and break it up into pieces. (B) [title] Roll out a sheet of parchment paper using a rolling pin. [step] Mix all the pieces of parchment paper together with a rolling pin until you have formed about of a soccer ball. (C) [title] Wet the fingers of one hand and vigorously scrub the thumb and forefinger with the raw egg or yolk. [step] Use the other hand to wash the hands or put away the scrub. (D) To make sure that the flour sift all the way in, let it sit for 1 minute. Then scoop some lumps out of the flour.
Output:
A