Which is the best example of an appeal to ethos?

a. children who suffer from obesity often have lower levels of self-esteem and self-confidence than those who are at a more normal weight.

b. dr. mia crawford, a board-certified cardiologist with 16 years of experience, has some strong opinions about the american diet.

c. twenty-five percent of children under the age of 12 are at risk for serious diseases such as juvenile diabetes and obesity.

d. imagine an overweight child who is bullied throughout his or her school years; what kind of self-loathing adult will that child become?