Steve and mary are married and then get a divorce. steve then marries rachel, and they get a divorce, too. steve remarries mary and lives with her until she dies. after mary's death, steve marries beth and lives with her until his death. these relationships of steve's life are an example ofa. polygamy. b.polygyny. c.serial monogamy. d.polyandry.

D. providing for public safety

Ifound the exercise on the internet. attached is the list mentioned above.in order for a compound to be considered optically active it can't have any axis or plan of symmetry. the molecule  shouldn't also  be superimposable on its mirror image.with such considerations, the compounds that are optically active are: -third compound on the first image is optically active; -second and third compound from the second image are optically actives.