Referring to a Membrane as "Selectively Permeable" Describes Its Ability

Referring to a membrane as "selectively permeable" describes its ability to

A) allow the movement of particular molecules across a membrane.
B) provide a minimal barrier that allows almost any molecule to move across a membrane.
C) restrict only the movement of sodium across a membrane.
D) restrict only the movement of potassium across the membrane.
E) provide a barrier that restricts the movement of all molecules across a membrane.