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 make a mask for acne [title] Crush the aspirins and put them into a bowl. [step] The easiest way to crush them is using a pestle and mortar. If you don't have one, then you can put them into a plastic sandwich bag and crush them with a rolling pin. <sep> (A) [substeps] If you don't have a pestle and mortar, it doesn't matter which technique you choose to use because you'll still be using any other technique to crush the aspirins. [title] Put half the eye mask in the bag with all the supplies. (B) [title] Crush the breath mints with the three tablets. [step] Take one of the mint tablets and crush the crushed compartment, or powder, of one of these tablets. (C) [substeps] Do not use this mask if you are allergic to aspirin. [title] Add enough water to turn the aspirin into a smooth paste. (D) You can also try shaking the amount that you do need into a jar and drinking the whole thing in one sitting. [title] Store any crushed aspirins.
C