Which of the Following Statements About an Acid-Base Buffer Solution

Which of the following statements about an acid-base buffer solution are correct?
(I) It can be prepared by combining a strong acid with a salt of its conjugate base.
(II) It can be prepared by combining a weak acid with a salt of its conjugate base.
(III) It can be prepared by combining a weak base with its conjugate acid.
(IV) The pH of a buffer solution does not change when the solution is diluted.
(V) A buffer solution resists changes in its pH when an acid or base is added to it.

A) I,II,and IV
B) II,III,and V
C) II,III,IV,and V
D) I,II,IV,and V
E) II,III,and IV