What is the relationship between the parent structure on the left and the structure on the right? A: Enantiomers B: Diastereomers C: Constitutional (structural) isomers D: Identical molecules A B C D What is the relationship between the parent structure on the left and the structure on the right? A: Enantiomers B: Diastereomers C: Constitutional (structural) isomers D: Identical molecules A B C D