Which of the Following Techniques Is the Most Advantageous Technique

Which of the following techniques is the most advantageous technique for separating enantiomers by chromatography?

A) use of a chiral stationary phase specifically designed for the enantiomeric pair
B) use of a mobile phase containing a chiral complexing agent which forms diastereomeric complexes during the chromatographic analysis
C) chemical derivatization of the enantiomeric pair, forming diastereomers prior to chromatographic analysis
D) chemical derivatization of the enantiomeric pair, forming diastereomers following chromatographic analysis