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 refuel your mana [title] Go outside. [step] This will remove any technological distractions and connect you to the earth. If you cannot, that is fine as well, it will just be significantly harder to harness energy (patios and porches are fine). <sep> (A) You can use your battery, cell phone, or computer to go outside and try to refuel. [substeps] Put off your activity until the time in which you are stopped by steady traffic coming into your neighborhood. (B) [title] If possible, have some fresh air. [step] Any kind of water source will do. (C) [title] Figure out what you are going to do. [step] If you do not already know, also find out how much energy you will need to move (this will not be visible to your body in real time if you are not in physical space). (D) The time of the day when you feel the most magic will make for the best results. Alternatively, undergrounds places such as caves (or even for a lack of natural caves, deserted underground areas) feel better and more effective to some people.
Output:
D