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 apply cold therapy [title] Use cold therapy as part of price. [step] Price stands for protection, rest, ice, compression, and elevation. Icing an injury just after it happens is important, and you should use every element of price in conjunction with cold therapy. <sep> (A) Every element of price is useful in helping ice do its work, which is to reduce pain from swelling and inflammation. [substeps] In other words, choose one method of delivering cold therapy as part of your price regimen. (B) Cold therapy can vary widely based on your particular injury, but it is structured to help you overcome common problems. [substeps] During cold therapy, ice and compression are applied to open ligaments and tendons, and vise into the core. (C) One class of cold therapy is to put cold therapy around the skin for 15 minutes at a time and then slowly treat each affected area individually. [substeps] Some cold therapy is meant to make the site cool for up to 10 hours, while others are lifelong treatments. (D) If the severity of your injury affects the 2-3 treatments, buying freeze dried ice packs is not wise. Freeze dried cold packs are covered by a single layer of ice.
A