Which of the Following Statements Is an Important Consequence of the First

Which of the following statements is an important consequence of the first law of thermodynamics for a living organism?

A) The energy content of an organism is constant.
B) An organism ultimately must obtain all of the necessary energy for life from its environment.
C) The entropy of an organism decreases with time as the organism grows in complexity.
D) Organisms grow by converting energy into organic matter.