what is the "Cell (plasma) membrane"? Question 1 options:

the structure that forms the surface of a cell separating its contents from the outside world.

a type of cell without a membrane-bound nucleus and without membrane-bound organelles, considered by scientists to be a more primitive type of cell than the more complex eukaryotic cells.

a small organelle, made of RNA and protein and found in both prokaryotic and eukaryotic cells, that forms proteins from amino acids .

a cell organelle that is essential to cell functions including reproduction, contains the cell's chromosomes, and is enclosed by a membrane.