The Invasion of the Land by Amphibians Posed a Number

The invasion of the land by amphibians posed a number of challenges requiring evolutionary innovations. Which one of the following does not match a challenge with an adaptation found in ampihibans that meets that challenge?

A) The force of gravity was greater without water's buoying effect-evolution of well-muscled legs.
B) The force of gravity was greater without water's buoying effect-evolution of lungs and cutaneous respiration.
C) Additional O₂ needed for larger muscles-three-chambered heart and pulmonary circuit.
D) Eggs dry out in terrestrial environment-evolution of amniotic egg.
E) Less O₂ available in air versus water-evolution of lungs and cutaneous respiration.