Read the excerpt from "Healthy Eating." "I was taking all these pills like an old woman," said Naar, a neonatology nurse at Baptist Hospital. "My blood pressure is hereditary, but I added to it by adding the pounds and eating horribly every day." . . .

A nutritionist took her shopping and introduced her to the joys of cauliflower. She upped her workouts, stopped eating hamburgers three times a week and scaled back on the Cold Stone pistachio ice cream.

Today, Naar is 20 pounds lighter and down to two pills a day.

Which evidence does the author use to support the argument that people can improve their health by making small changes to their diets?

an expert quotation
scientific facts
an anecdote
historical information