The second law of thermodynamics states that: A. the energy of the universe is constant. B. the entropy of the universe is constant. C. the entropy of the universe is increasing. D. the energy of the universe is increasing. E. the entropy of a perfect crystal is zero at 0 K.

Which best describes the present-day universe? opaque, expanding very slowly, stars produce heavy elements transparent, expanding at an accelerated rate, stars produce heavy elements opaque, expanding at an accelerated rate, stars produce only hydrogen and helium transparent, expanding very slowly, stars produce only hydrogen and helium