What is/are the major role(s)of the phospholipid bilayer in the cellular membrane?

A) the absorption of fats only
B) the formation of a barrier that is selectively permeable to lipid-soluble molecules only
C) to provide a framework for membrane proteins only
D) to carry water-soluble molecules through a hydrophobic environment only
E) the formation of a barrier that is a selective for lipid-soluble molecules and to provide a framework for membrane proteins