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 fast for a day [title] Clarify your purpose in fasting. [step] Ask yourself what you wish to learn from the experience, and use this purpose to set an intention for the day. You may find that you get much more out of the fast if there is a drive behind your discipline. <sep> (A) [substeps] Plan a quick meal for yourself and a place to fall behind. While fasting, you'll most likely do this for 12 hours, but if you start to feel tired you might want to make the whole experience a goal. (B) Consider whether you have any goals for spiritual or mental development, or whether you are simply trying to tap into the physical benefits. Meditate on a theme, a question, or a goal. (C) Try to reason that the less physically and mentally sore you feel, the more you can focus on the task at hand and also the healthier your days will be. [substeps] Sanitation is a necessary factor for success at fasting. (D) [substeps] Write down your reasons why you enjoy a fast, for example. Talk to friends or family members who have enjoyed a fast before, and ask if they'd appreciate you speeding up each time you take a fast.
Output:
B