Which of the Following Factors Could Cause the Cell Membrane

Multiple Choice

Which of the following factors could cause the cell membrane to become less permeable?

A) If the channel proteins were to denature and become inactive.
B) If the molecules trying to enter the cell were decreased in size.
C) If the hydrophilic head of the phospholipids were to become hydrophobic while the hydrophobic tails become hydrophilic.
D) If the size of the protein channel was to increase.
E) All of these choices would cause the cell membrane to become less permeable.