A Solution of Weak Base Is Added to a Beaker

A solution of weak base is added to a beaker of water. Which of the following will be true as the base is added to the water?

A) [H₃O⁺] increases [OH ^- ] decreases pH increases
B) [H₃O⁺] decreases [OH ^-F ] increases pH decreases
C) [H₃O⁺] decreases [OH ^- ] decreases pH increases
D) [H₃O⁺] remains constant [OH ^- ] increases pH increases
E) none of these