What Is the PH of a 0

What is the pH of a 0.25 M solution of the weak base , Aniline, C₆H₅NH₂?
K _b(C₆H₅NH₂) = 4.0×10 ^{- 10}.
You may want to complete the following table before getting started. A simplifying assumption would be valid here. C₆H₅NH₂ C₆H₅NH₃⁺ OH^{1 -} Initial Change @ equilibrium

A) pH = 4.00
B) pH = 4.40
C) pH = 5.00
D) pH = 9.00
E) pH = 9.60