Which of the following options best describes the mechanism that causes a stoma to open?

Options

A. `K^(+)` enters the guard cells and water follows passively, making the cells turgid.
B. `K^(+)` activates water pumps in the guard cell membrane that make them turgid.
C. `K^(+)` leaves the guard cells and water follows passively, making the cells flaccid.
D. Loss of `K^(+)` from guard cells creates positive pressure and expands the guard cells.

Answer

A