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 perform a quick visual imagery relaxation exercise [title] Sit comfortably in your chair with your feet flat on the floor. [step] Place your hands palm facing up in your lap. [title] Close your eyes. <sep> (A) [step] Pretend that the bottom of your chair is closed and then slowly open your eyes again to focus on the visualization. You're almost ready to start this exercise when the image of a star fills your mind. (B) [step] Don't hold those thoughts for too long. Try guided visualization in which you imagine things that have happened before. (C) [step] Place your index and middle fingers against your eyes, but don't keep them there. [substeps] You might even want to squeeze your eyes shut to partially block out sound. (D) [step] Take a deep breath in, hold it for a second, then blow it out, completely emptying your lungs. Continue to breathe deeply, paying attention to each breath.
Output:
D