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".

A man wearing a black shirt and a red tie is now standing behind a bar with a lot of alcohol supplies in front of him and he begins pouring many different ingredients into a large, silver cup. when he <sep> (A) 's done pouring all of the ingredients into the cup, he begins to pour as much of it into the cups and drinking water as many of them go in the cup. (B) is done, he takes out a bottle of glue and demonstrates how he is going to seal the cup. (C) 's done with his ingredients he puts a smaller, clear cup turned upside down into the silver cup to create a cover, and begins to shake them both vigorously until he's satisfied with the mixture. (D) 's done with the glass, he moves the glass to a different bar and pours a liquid into it and replaces it with a very fozoid looking liquid that tastes very similar to alcohol.
C