Brett believes that talking on a cell phone and driving is likely to lead to an accident. Brett makes note of any accident when the driver is on the phone but tends to ignore accidents when the driver is not. This is an example of: a. dependent variable
b. participation bias
c. confirmation bias
d. independent variable

Is it just free response or do you have multiple choice?

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.