The Opening of Stomata in the Light Involves _______, and Their

The opening of stomata in the light involves _______, and their closing in the dark involves _______.

A) diffusion of K⁺ into guard cells; passive efflux of K⁺ from guard cells
B) passive uptake of K⁺ by guard cells; active efflux of K⁺ from guard cells
C) active uptake of H⁺ by guard cells; passive efflux of H⁺ from guard cells
D) uptake of water from guard cells; loss of water by guard cells
E) active pumping of H⁺ into guard cells; diffusion of Cl^- out of guard cells