The Autoionization of Pure Water, as Represented by the Equation $\rightleftharpoons$

The autoionization of pure water, as represented by the equation below, is known to be endothermic (?_r? > 0) . Which of the following correctly states what occurs as the temperature of pure water is raised?
H₂O(l) + H₂O(l) $\rightleftharpoons$ H₃O⁺(aq) + OH^-(aq) ?_r? > 0

A) K_w decreases, and the hydronium ion concentration decreases.
B) K_w decreases, and the hydronium ion concentration increases.
C) K_w and the hydronium ion concentration do not change.
D) K_w increases, and the hydronium ion concentration decreases.
E) K_w increases, and the hydronium ion concentration increases.