Gas Exchange in the Aquatic Salamander Known as the Axolotl

Gas exchange in the aquatic salamander known as the axolotl is correctly described as

A) active transport to move oxygen into the salamander from the water.
B) facilitated diffusion to move oxygen into the salamander from the water.
C) facilitated diffusion of carbon dioxide from the salamander into the water.
D) simple diffusion of oxygen into the salamander from the water.
E) active transport of carbon dioxide from the salamander into the water.