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".

Example Input: A large group of people are seen playing instruments with one another. the camera <sep> (A) pans around the audience and shows the audience shaking hands. (B) pans around to show many people leading in front and the drummer leading in front. (C) follows a bull that ties up a man on the ground. (D) zooms in on a man playing a violin.
Example Output: D

Example Input: [header] How to add potassium to an organic garden [title] Mix in muriate of potash or sulfate of potash. [step] Muriate of potash, or potassium chloride, and sulfate of potash, or potassium sulfate, are natural minerals. Muriate of potash tends to be cheaper, but the chlorine it contains can hurt the helpful microbes living in your garden's soil. <sep> (A) Gently mix these two together first, then add the zinc sulfate. [substeps] Zinc sulfate is readily available online, or in desalination solutions. (B) [substeps] You can substitute sodium thiamine (ipsin) or baking soda for sulfate because it is the most acidic fertilizer. Sodium thiamine is a common fertilizer in agricultural and organic gardens. (C) Sulfate of potash is safer, but it's a bit more expensive. [substeps] Check your product's label for specific instructions on how much to add per square foot or meter. (D) [substeps] There are many ways to add potassium to soil: you could use the most common method. You could sift the potassium into an empty feed colander and cool it before dropping it off.
Example Output: C

Example Input: [header] How to pull a prank for april fool's day [title] Set it up where a person is comfortable. [step] That is, pick a place that is a part of the person's normal routine. If you try to get them to come to the prank rather than having the prank come to them, they're more likely to be suspicious, especially on april 1. <sep> (A) Plus, though you may be able to win there, they're probably still suspicious about you sooner than april 1 if you happen to come across someone they don't recognize. [title] Connect everything you want to do to the prank. (B) [substeps] For instance, set up the prank in their home or work, as they are most comfortable there. If you ask them to meet you somewhere or come outside, for example, they may become suspicious. (C) People that are more relaxed can have more success. [substeps] Set the prank up somewhere that is relatively quiet, like a park, leafy forest, or around other people. (D) [title] Increase the adrenaline in your body beforehand. [step] Also pay attention to every little thing that goes through your mind in preparation.
Example Output:
B