What does it mean to relax with deep breathing?
A. Inhale slowly through the nose, hold breath for a few seconds and exhale through the mouth
B. Inhale slowly through the mouth, hold breath for a few seconds and exhale through the nose
C. Inhale quickly through the mouth, hold breath for a few seconds and exhale through the nose
D. Inhale slowly through the mouth, exhale through one’s teeth
a?