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 choose a bath salt [title] Check the packaging. [step] All bath salts start as sea salt, but if they're too processed, they can lose their beneficial qualities. Look for bath salts in packages that read " natural " or " pure. <sep> (A) " [substeps] Sea salt may not come in powdered or salt form, but it does come in separate packets. Try looking for packets that advertised " natural " and " pure, " which means they are exactly what they sound like. (B) " those are the most likely to have retained their best ingredients. [title] Buy your salts from a reputable source. (C) " pure bath salt is usually made from natural ingredients, and can have a nutty tang. [substeps] If you go to a grocery store, choose one made from natural ingredients as well. (D) " these options are often much safer than sea salt and are usually sold at low prices. [title] Consider adding b12 salts for quicker sinus relief.
B