Which of the following statements concerning animal or dinosaur skeletal designs is FALSE?

a. For a really huge plant-eating dinosaur, walking on tip-toe was a better way to handle the stress of their enormous mass.
b. Animals that rely on speed tend to have shorter upper leg bones, with longer lower leg bones and greatly extended ankles.
c. Much of an animal's skeletal design can be interpreted in terms of better ways of getting or processing food.
d. An erect stance allowed the earliest dinosaurs to run and breathe at the same time, which greatly increased their endurance.
e. The main benefit of a bipedal stance was that it allowed the earliest dinosaurs to be taller, so they could feed on higher vegetation.