Answer:
A.
Step-by-step explanation:
Choice A states, "Human liver cells make proteins that promote homeostasis, and neurons do not." This statement supports that complex, multicellular organisms are composed of specialized cell types with different functions. First, humans are multicellular organisms. Next, Choice A points out the difference between liver and neuron cell function (liver cells can promote homeostasis while neurons do not), which means that the cells that compose a human are specialized with different functions.