Given the task definition and input, reply with output. 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 create an eyeshadow primer [title] Choose your container. [step] Before you start, you need to find a little container to use for mixing your ingredients. You can clean out an old eye shadow pot and use that, but a dixie cup, a contacts case, or any small container works fine. <sep> (A) [substeps] Old optic lenses are great container options. If you need more than one for mixing or using your eyeshadow primer, you can use a small eyeshadow bottle instead of a container. (B) Just make sure it is thoroughly cleaned before you begin. [title] Add equal amounts of foundation and concealer. (C) Storage containers should be pretty small so they cannot roll around or fall out of place. A contact case will also help keep your eyeshadow from slipping out, which could ruin your primer. (D) [substeps] You can use a dish sponge, toilet paper, old toothbrush, or anything else that you think is a good size. Choose a container that's large enough to hold the ingredients you'll be using.
B