The Land Animals That Evolved from Earlier Aquatic Forms Had

The land animals that evolved from earlier aquatic forms had to change their mechanisms for excreting nitrogenous wastes because

A) land animals found better food sources.
B) land animals had a more difficult time with water balance than aquatic species since water was not always available on land.
C) aquatic animals did not have as much protein in their diets as did land animals.
D) land animals concurrently developed a more efficient reproduction system.