Which of the Following Breathing Exercise Techniques Would Enhance Fast-Twitch

Which of the following breathing exercise techniques would enhance fast-twitch glycolytic muscle fibers of the diaphragm in a patient with good strength?

A) Three quick sniffs through the nose with slow relaxed exhalations.
B) Deep breathing using diaphragmatic breathing for 30 minutes,two to three times per day.
C) Manual resistance applied to the diaphragm through the inspiratory phase.
D) Reduces the number of sniffs to one at an increasingly slower pace.