After Completing the Following Unfinished Table, What Is the Order

After completing the following unfinished table, what is the order of increasing base strength ?
Base K _b p K _b Fluoride ion, F ^- 1.5×10 ^{- 11} Ammonia, NH₃ 4.75 Acetate ion, CH₃COO ^- 5.7×10 ^{- 10}

A) (weakest) Fluoride ion < Ammonia < Acetate ion (strongest)
B) (weakest) Fluoride ion < Acetate ion < Ammonia (strongest)
C) (weakest) Ammonia < Fluoride ion < Acetate ion (strongest)
D) (weakest) Acetate ion < Ammonia < Fluoride ion (strongest)
E) (weakest) Acetate ion < Fluoride ion < Ammonia (strongest)