Which of These Was NOT Offered as an Explanation of How

Which of these was NOT offered as an explanation of how relaxation and meditation might promote health?

A) These techniques provide relief from stress, muscle tension, anxiety, and negative emotionality, all of which increase a person's vulnerability to ill health.
B) Relaxation and meditation bolster the immune system.
C) Relaxation and meditation may alter a person's emotional response to symptoms.
D) People who regularly practice relaxation or meditation techniques tend to have healthier lifestyles.