Which of the following statements is not an essential feature of an optically active compound?

• A. The molecules of an optically active compound will be dissymetric or asymmetric.
• B. The molecules of an optically active molecule must have at least one stereogenic site.
• C. An optically active compound's molecular configuration will not be identical with its mirror image
• D. An optically active compound will have at least one stereoisomer.