Consider the Buffer Pair, HF/F ^-

Consider the buffer pair, HF/F ^- . What can be stated about the relative proportions of this buffer pair if the pH of an aqueous solution of this pair is adjusted tO₄.00 and the p K _a for HF equals 3.17?

A) This buffer solution contains relatively more HF than F ^- .
B) This buffer solution contains relatively more F ^- than HF.
C) This buffer solution contains equal concentrations of HF and F ^- .
D) More information is needed to determine the relative proportion of each member.