could u explain this question?

Kw comes from the autoionization of water which is endothermic process.

Heat + 2  H₂O  ⇌  H₃O⁺  +  OH⁻

Kw is temperature-dependent because the autoionization is an endothermic process:
•    If temperature increases → equilibrium shifts right (Le Châtelier's principle) → [H3O+][H₃O⁺][H3O+] and [OH−][OH⁻][OH−] both increase → Kw increases.
•    If temperature decreases → equilibrium shifts left → [H3O+][H₃O⁺][H3O+] and [OH−][OH⁻][OH−] both decrease → Kw decreases.
Now pick up your answer.

ohhh okay then it will be d