Which Statement Is True

Which statement is true?

A) Kinetic resolution is used to separate diastereomeric amino acids.
B) Optically inactive alkaloids are used to convert two enantiomeric amino acids into two diastereomeric ammonium salts.
C) A racemic mixture of amino acids can be separated by enzymatically modifying either the D- or L-amino acid in such a way that it can be separated from the other.
D) D-amino acids are more prevalent in nature than L-amino acids.
E) A racemic mixture of amino acids can be separated by fractional crystallization.