Answer:
B. Changing passwords frequently makes you likely to forget which isn't helpful, using a personal e-mail address is unprofessional, only limiting the number of people and keeping it down to just enough people who need to see it can see it is truly helpful.
The statement about bipolar disorder which is true would be that periods of depression usually last longer than do periods of mania - b. This, however, is dependant on the person and whether/how he has been diagnosed and in which time of lie as it may vary.
