A medicine is a chemical substance that is used to treat, prevent or diagnose a disease.
I would go with C if she eats out of the bag as a snack between meals then it won't really help!
Many fast food restaurants have healthy choices on their menu. Salads with low calorie/ low fat dressings. Lean proteins like grilled chicken are also a good choice. A balanced diet is part of a healthy eating pattern, so eating fast food in moderation is a good choice.
