Aquatic Animals Such as Fish and Frogs Are Especially Good

Aquatic animals such as fish and frogs are especially good indicators of water pollution because ______________.

A) most chemicals are water soluble so they enter these organisms through drinking or skin absorption
B) they are easy to catch
C) these organisms are the most abundant on Earth
D) the metabolism of these organisms is most like ours
E) all chemical toxicants are found in water