Refer to the microscopic photos below. Which cell is an onion cell and which is a cheek cell, and why?

A is a cheek cell slide because it is colorless, has a nucleus, and a cell membrane. B is an onion cell slide because it has color, has a nucleus, a cell membrane, and a cell wall.

B is an onion cell slide because it shows each cell with a nucleus, cell membrane and cell wall. A is a cheek cell slide because it shows a cell slide that does not have a cell wall, only a cell membrane as its outermost layer.

B is a cheek cell slide because it has a nucleus, a cell membrane and a cell wall as its outermost layer. A is an onion cell slide because it has a nucleus, a cell membrane and no cell wall.

A is an onion cell slide because it shows each cell with a nucleus, cell membrane and cell wall. B is a cheek cell slide because it shows a cell slide that does not have a cell wall, only a cell membrane as its outermost layer.