Ocean acidification is of considerable concern to environmental scientists as it could impact ocean biodiversity significantly. As
carbon dioxide levels increase in the atmosphere, the diffusion of this gas increases in the oceans too. The formation of carbonic acid
can impact species, as the lowered pH can cause weakening of shells made of calcium. Which of these species is not directly impacted
by ocean acidification?

A.) sea turtles

B.) oysters

C.) corals

D.) clams