Which of the following statements is NOT an example of scientific evidence?
A. "...laughter causes amazing biochemical changes that boost the immune system."
B. "Mirthful laughter decreases three destructive stress hormones: cortisol, epinephrine, and dopac."
C. "Children are taught to pay attention and be serious, and that laughter is not important."
D. "Good cholesterol increased by 26 percent compared to 3 percent..."
