An Air-Filled Parallel Plate Capacitor Is Connected to a Battery

An air-filled parallel plate capacitor is connected to a battery of voltage V_o.There is charge Q_o on each plate,energy U_o stored between the plates and an electric field of E_o between the plates.The capacitor remains connected to the battery and a dielectric material with a dielectric constant of K is then placed between the plates of the capacitor.What are the new values of V,Q,U,and E? V Q U E

A) V_o/K,KQ_o,U_o,E_o/K
B) KV_o,Q_o,K²U_o,E_o/K
C) V_o/K,Q_o,U_o/K,E_o/K
D) V_o,Q_o/K,U_o/K,E_o
E) V_o,KQ_o,KU_o,E_o