Although amphibians use gills during their aquatic larval stage and develop simple, sac-like lungs as adults,?

A. thin projections of the body surface that protrude into the surrounding water


B. countercurrent exchange mechanisms


C. inflatable air sacs that store air


D. diffusion of gases into and out of capillaries through their thin, moist skin|||The answer is D. diffusion of gases into and out of capillaries through their thin, moist skin