A. Because carts scared the pigs away.
B. Because carts injured a large number of people.
C. Because carts often moved too slowly.
D. Because carts broke down too easily.

A. A good, healthy diet is better than vitamins in pill form.
B. Don’t waste money on fruit and vegetables.
C. Vitamins are too expensive; so have apples.
D. Vitamins in pill form are not good to the body.