Most Land-Dwelling Invertebrates and All of the Amphibians

Most land-dwelling invertebrates and all of the amphibians

A) are ectothermic organisms with variable body temperatures.
B) alter their metabolic rates to maintain a constant body temperature of 37°C.
C) have a net loss of heat across a moist body surface, even in direct sun.
D) are endotherms but become osmoconformers only when they are in water.
E) become more active when environmental temperatures drop below 15°C.