Answer:
b. lean meat and fish
Step-by-step explanation:
The brain needs a steady fuel supply and it's main energy source is glucose which is the broken down form of carbohydrate. If the college student's diet consist of only lean meat and fish he will have difficulty in concentrating during class and while studying because the brain is running on low energy. Lean meat and fish are very low in carbohydrates while pasta, chicken, sandwiches, diet drinks, fruits and vegetables have moderate amount of carbohydrate that can be broken down to glucose and act as source of energy to the brain.