Which of the following is the most accurate statement comparing cell membranes and cell walls?

A. Cell membranes are found only in animal cells cell walls are found only in plant cells

B. Cell membranes function mostly as selectively Premable gatekeepers while cell wall functions mainly as support system

C. So walls prevent everything from entering the cell while cell membranes allow somethings to enter

D. Cell walls function mostly for photosynthesis while cell membranes function mostly for cellular respiration