16.The acid known as HEPES has a pKa of 7.55 and the known substance TRIS has a pKa of 8.3. Which of the following statements is true?

a. HEPES would have a better capacity to buffer at a pH 8.

b. The conjugate base of TRIS is a better proton acceptor compared to HEPES conjugate base.

c. TRIS is the strongest acid and has the least tendency to lose a proton.

d. TRIS is considered the weakest acid and has the biggest tendency to lose a proton.

e. None of the above.