Which of the Following Statements About the Movement of Potassium

Which of the following statements about the movement of potassium ions is true?

A) K⁺ enters guard cells, water follows, and the cells become turgid.
B) K⁺ leaves guard cells, and they become less turgid.
C) K⁺ enters guard cells, and they become less turgid.
D) K⁺ leaves guard cells, and they become turgid.
E) K⁺ reaches equilibrium in guard cells and their surroundings.