【单选题】Formation of a lipid bilayer is energetically favorable。 How does this arrangement result in higher entropy for the system, and thus make bilayer formation energetically favorable?
选项：

A:Polar head groups form a hydrogen-bonding network at the interface with water。
B:Water molecules form cagelike structures around hydrophobic molecules。
C:Hydrogen bonds form between neighboring polar head groups in the bilayer。
D:Fatty acid tails are highly saturated and flexible。