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

Which of the statements below about an acid-base buffer solution is/are true?
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