Jack reports being in a wonderful mood. He has been very active at work lately, even working far into the night, as he seems to need only a few hours of sleep at night. He is very talkative and quickly moves from one topic to another, describing a scheme he has for making a fortune in the stock market. These behaviors represent a change from Jack's normal behaviors and have caused severe functional impairment. He reports no previous periods like this. Which of the following diagnoses would best fit Jack?
a) Overanxious disorder.
b) Dysthymic disorder.
c) Bipolar disorder.
d) Cyclothymic disorder.

How did dynasties end and how did new ones start?

Which of the following statements concerning brazil since independence is not true? brazilians today can participate in politics through voting. brazil has been governed by dictators and elected officials. brazil became independent from portugal in 1822. brazil was the first country in the americas to end slavery.

It is widely assumed that people need to engage in intellectual activities such as solving crossword puzzles or mathematics problems in order to maintain mental sharpness as they age. in fact, however, simply talking to other people—that is, participating in social interaction, which engages many mental and perceptual skills—suffices. evidence to this effect comes from a study showing that the more social contact people report, the better their mental skills. which of the following, if true, most seriously weakens the force of the evidence cited? (a) as people grow older, they are often advised to keep exercising their physical and mental capacities in order to maintain or improve them. (b) many medical conditions and treatments that adversely affect a person's mental sharpness also tend to increase that person's social isolation. (c) many people are proficient both in social interactions and in solving mathematical problems. (d) the study did not itself collect data but analyzed data bearing on the issue from prior studies. (e) the tasks evaluating mental sharpness for which data were compiled by the study were more akin to mathematics problems than to conversation.