Which of the following best describes how organ systems within a multicellular organism contribute to the organism’s overall function? Choose 1

A. Organ systems, such as the excretory and nervous systems, can each carry out all of the functions necessary for the organism's survival.

B. Organ systems, such as the respiratory and immune systems, carry out unique functions independently of one another, allowing the organism to carry out all of life's processes at the same time.

C. Organ systems, such as the circulatory and digestive systems, have unique roles but interact in order to carry out the functions necessary for life.