Which of the Following Is True for a Buffered Solution

Multiple Choice

Which of the following is true for a buffered solution?

A) The solution resists any change in its [H⁺].
B) The solution will not change its pH very much even if a concentrated acid is added.
C) The solution will not change its pH very much even if a strong base is added.
D) Any H⁺ ions added will react with a conjugate base of a weak acid already in solution.
E) all of these