Instructions: 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".
Input: [header] How to clean a kegerator [title] Clean your kegerator after each keg. [step] Every time you use your kegerator, you should clean it afterwards. This helps remove all beer residue from the line and faucet. <sep> (A) Wipe down your kegerator with a cloth or sponge after each keg brew. [substeps] Make sure you scrub any beards and mats with a soft cloth. (B) Wsers should thoroughly clean the entire tank before storing the kegerator for storage. [substeps] Don't use the motor when cleaning a meter meter and pour your own fluid into the meter. (C) You can loosen the parts that hold up the water line by pulling on a socket wrench or a heavy object. The socket wrench will help you remove the parts of the kegerator you plan to clean. (D) Cleaning after every use helps you avoid messing up other beers. [substeps] If you don't clean between kegs, microbial infections may occur in the kegerator that will alter the beer.
Output:
D