Cam Has Frequent Bouts of Abdominal Cramping with Constipation Following

Cam has frequent bouts of abdominal cramping with constipation following by diarrhea. Cam underwent a colonoscopy, which ruled out any serious disorders of his large intestine. According to his physician, Cam's "gut problem" is common and doesn't increase his risk of colon cancer. To treat Cam's condition, the physician told Cam to learn ways of managing his stress and try

A) fasting (not eating) every other day to rest his digestive tract.
B) lying down after large meals to slow down peristalsis.
C) taking probiotics with live and active cultures.
D) drinking more fluids between meals.