Which of the Following Provides the Most Likely Explanation for Why

Which of the following provides the most likely explanation for why cell membranes are asymmetrical?

A) Proteins only function on the cytoplasmic side of the cell membrane, which results in asymmetry across the membrane.
B) Cell-to-cell communication requires different proteins on the surfaces of interacting cells.
C) The molecular composition of the inner and outer layers of the cell membrane is determined by genes.
D) The two sides of a cell membrane face different environments and carry out different functions.