L-Amino Acids Are the Most Common Form

Multiple Choice

L-amino acids are the most common form. L signifies

A) the absolute configuration of the asymmetric C-atom as compared to L-glyceraldehyde.
B) the levorotation of plane polarized light by solutions of these compounds.
C) the fact that the amino group is attached to C-atom #1.
D) the designation is of historical origin and bears no relationship to structure.
E) none of the above