Which Statement Is True

Which statement is true?

A) At low temperatures an ectotherm would seek shade.
B) At high temperatures an endotherm would orient to the sun.
C) For endotherms, sweating to dissipate heat does not require an expenditure of metabolic energy.
D) With every transfer of energy in a biological system, some energy is gained as heat.
E) Energy is transferred from food molecules to ATP in ectotherms and endotherms.