Melissa Was Recently Diagnosed as Suffering from Bipolar Disorder

Multiple Choice

Melissa was recently diagnosed as suffering from bipolar disorder.When her coworkers find out,they stop inviting her to get drinks after work,and her boss promotes several less qualified employees ahead of her.The most likely cause of the behaviour of Melissa's colleagues is

A) the M'Naghten effect.
B) the stigma associated with mental illness.
C) her coworkers confusing "unusual" behaviour for "abnormal" behaviour.
D) her coworkers confusing bipolar disorder and schizophrenia.