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 rolf yourself [title] Purchase a foam roller or lacrosse ball. [step] There are several pieces of equipment designed specifically for myofascial release. Purchase a foam roller, lacrosse ball, or specialty myofascial release tool online. <sep> (A) [substeps] You do not need to purchase a basketball or tennis puck to use the foam roller. You can rent or buy a lacrosse or tennis stick from a sporting goods store. (B) Read reviews on the tools before you purchase them to make sure that they worked for other people. [title] Locate sore trigger points on your body. (C) [substeps] Anywhere from 4 feet (1.8 meters) to 3 feet (1.4 meters) is good for leakage. Make sure that you are able to set your mat or train the balls in a safe manner with the roller. (D) [substeps] These can range from $20-250 usd tools and are available both pre-and subscription models. Some sports stores are on sale with foam rollers that have been screened.
Output:
B