Instructions: 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".
Input: [header] How to astral project (beginners ) [title] Lie down on a flat surface. [step] A bed, couch, or sofa are good surfaces. If you're comfortable with lying down on the floor, then that's fine too. <sep> (A) If not, rest yourself on the bottom of a broom-board stool or in a chair. Make sure you're in a comfortable position. (B) If you are very uncomfortable standing up, you don't have to. Lie down on the ground, or you can even lie on your side if you feel like being comfortable is what you want to do. (C) If you prefer the sofa, you can use a reading chair as a foundation or just your own pillows. In the chair, put your feet on top of each other, and lean back if that feels more comfortable. (D) [substeps] Make sure you are as comfortable as possible, and wearing comfortable clothes (pajamas are recommended ) [title] Close your eyes and relax. [step] Try to not fall asleep, however.
Output:
D