Scientists believe that the modern horse developed from a short, horse-like mammal about the size of a dog. Over millions of years, the horse increased in size and developed much longer legs. Horses with longer legs had a better chance of surviving than the shorter-legged members of the herd. How did longer legs help horses survive? A. They allowed the horses to reach nuts in trees.

B. They allowed the horses to outrun predators.

C. They allowed the horses to carry more body weight.

D. They allowed the horses to capture prey.