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 zest a citrus fruit [title] Wash the citrus. [step] Before you get started, run the fruit under a stream of cool water, then buff it gently with a clean cloth or paper towel. A light rinse will help remove the natural waxy residue on the outside of the fruit. <sep> (A) [substeps] Make sure that the fruit is completely rinsed off before proceeding to the next step. Most citrus fruit will have the bruised part removed, but with the middle part, you can alternate between refreshing the peel with water and removing the skin. (B) [substeps] The work also is best done in the late evening, after the sugar has evaporated. [title] Make an acidic citrus by plunging a bowl of salt in the water. (C) You can also give the citrus a quick soak in a shallow bowl of water. [substeps] It's important to wash citrus fruit any time you're zesting, since the outside is the part that will actually be going into your food. (D) [title] Put the zest mixture in a dropper. [step] Commercially available zest comes from the peel of the citrus tree.
Output:
C