The most accurate single-sentence summary of the technique is:

• A. It uses breathing to calm nerves
• B. It uses breathing to measure heart rate
• C. It uses breathing to reduce appetite
• D. It uses breathing to draw attention away from burning sensation to contaminant cause

Answer: (D)

Breathing is used here to control attention under stress: the technique aims to shift focus away from the burning sensation and toward identifying the contaminant cause. That makes it the best single-sentence summary because it describes both the method (breath) and its purpose (redirecting attention to the underlying cause rather than dwelling on pain). The other options describe functions that don’t fit the technique’s goal—calming nerves, measuring heart rate, or reducing appetite are not what this breathing approach is intended to do in this context.