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 relieve anxiety [title] Take deep breaths. [step] Pause what you are doing and focus solely on your breath. As you inhale, draw the air into your belly, rather than just your upper chest. <sep> (A) Then, exhale slowly through your nose. Repeat this process 5 times, then resume normal breathing. (B) Actively counting the number of breaths you took in through your diaphragm. This could take some practice, but it's important to commit to a steady state of breathing. (C) Inhale slowly and steadily, until you feel your chest expand to fill the space you've entered. [substeps] Close your eyes and count to five. (D) Hold it there, then release it back into your belly. Repeat several times if that is what is triggering your anxiety.
Output:
A