Which sentence would best support the claim that, in order to be healthier, teenagers should avoid sodas and snacks made with sugar?
A. Studies show that teenagers reach for sugary snacks when they're tired.
B. Vegetables and fruit smoothies can taste as good as sugary snacks.
C. Dentists cite a sugary diet as one of the primary causes of tooth decay.
D. A trip to the grocery store will show that sugary snacks often cost more money than healthful foods.