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 clear chest congestion [title] Do a gargle. [step] Gargles aren't always the most appealing, but they help to break apart mucus in your airways. Mix half a cup of warm water with 1-2 tablespoons of salt, and a pinch of turmeric. <sep> (A) Gargle the mixture for about 3-5 deep breaths, then spit it out. [substeps] Gargles are available over-the-counter. (B) Let the mixture sit on your chest for 10-15 minutes. Swish with the salt and water until it feels like you have restored moist airways. (C) Gargle for 5-10 minutes, then spit it out. [substeps] This may be slightly more painful than gargling with cold water, but really forces mucus out of your chest. (D) Stir the mixture to dissolve the salt a bit, and then take a swig. Gargle it as far down your throat as you are able for 1-2 minutes , 3-4 times a day.
Output:
D