Consider the following statements.

A. One of the most important functions of the plasma membrane is the transport of the molecules across it.

B. The membrane is selectively permeable to some molecules present on either side of it.

C. Many molecules can move briefly across the membrane without any requirement of energy and this is called the active transport.

D. Neutral solutes may move across the membrane by the process of simple diffusion along the concentration gradient.

E. Movement of water by diffusion is called osmosis.

How many statement(s) is/are incorrect.