Why Is the Phospholipid Bilayer Considered Semipermeable

Multiple Choice

Why is the phospholipid bilayer considered semipermeable?

A) Large molecules can only pass through the layer of hydrophilic phospholipids.
B) The bilayer is a barrier to some,but not all,substances on either side of it.
C) The hydrophobic tails act as a barrier to nonpolar molecules.
D) The bilayer is completely nonpolar,which prevents some molecules from passing.
E) Small,nonpolar molecules do not pass through the phospholipid bilayer.