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: [header] How to make black coffee [title] Purchase freshly roasted, whole bean coffee. [step] If you can't purchase it directly from the roaster within a week or so of it being roasted, opt for a vacuum-sealed bag from a reputable national coffee-bean roaster. [title] Purchase your own coffee grinder, or grind it in the store. <sep> (A) [step] If possible, choose a burr grinder in place of a normal blade grinder. For best results, grind the coffee fresh right before brewing each day. (B) [step] Grind coffee beans in the near-black zone of a coffee grinder. You can use either a regular-size grinder or a pre-grind grinder to grind your coffee. (C) [step] Modern coffee grinders have drawbacks, as they require higher temperatures to make purified coffee. Where possible, purchase one that comes pre-boil. (D) [step] Print it onto a piece of paper, remove the lid from the coffee grinder, and grind the coffee beans in the machine's center. [title] Unplug the coffee grinder and plug it into the wall outlet.
Example Output: A

Example Input: [header] How to make absinthe cocktail [title] Mix a simple blend. [step] Add 3 parts ice-cold water to 1 part absinthe. For a single serving, this is roughly 3 ounces of absinthe (or 3 shots) to 1 ounce of absinthe (or 1 shot). <sep> (A) [substeps] If you don't like the bitterness of the mixture, you can dilute it with 1 ounce of milk or cider vinegar instead. If you don't like the strong, milkier flavor, you can substitute nothing at all. (B) Place the absinthe in a cocktail shaker. [substeps] This drink will only last if you serve it in a cup, as the glasses will be fairly small, and will take up a lot of room. (C) For each single serving, stir in 1 teaspoon of sugar. [substeps] Alternately, absinthe can be sipped neat if you prefer the undiluted taste. (D) [title] Add the ingredients to the cocktail shaker. [step] Stir the absinthe mixture well with a cocktail spoon.
Example Output: C

Example Input: A group of people are running around inside a gym. they <sep> (A) are engaged in a competition of kickboxing. (B) are dancing together and doing martial arts. (C) take turns throwing a disc onto the field. (D) are doing various cheerleading routines.
Example Output:
D