Common obstacles or barriers of successful problem solving include all of the following except . A. inferring unnecessary constraints B. ignoring irrelevant information C. using rigid thinking that was used to solve past problems D. perceiving items as useful for only their original function Please select the best answer from the choices provided A B C D

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.