Which statement describes a person making a risky health decision as a result of social conformity?
a. a student eats five pieces of cake because he can't resist its delicious taste.
b. a teenager avoids exercise because he doesn't think it's necessary for people his age.
c. a teenager ignores the speed limit when driving because she gets a thrill out of speeding.
d. a student begins smoking cigarettes because many of her friends smoke.