How Do Competing Influences Undermine Healthful Food Intake and Food

How do competing influences undermine healthful food intake and food selection at schools?

A) By discouraging participation in the USDA-sponsored school lunch program
B) By encouraging students to bring unhealthful lunches to school
C) By promoting short lunch periods and long waiting lines in the cafeteria
D) By offering cheaper but less nutritious meals to low-income students who qualify for reduced-price school lunches