Which of the Following Is True

Multiple Choice

Which of the following is true?

A) An effective buffer has a [base]/[acid] ratio in the range of 10 - 100.
B) A buffer is most resistant to pH change when [acid] = [conjugate base]
C) An effective buffer has very small absolute concentrations of acid and conjugate base.
D) A buffer cannot be destroyed by adding too much strong base.It can only be destroyed by adding too much strong acid.
E) None of the above are true.