______ in the notion of a game is that of taking a risk, and one bases one's decision on what it will cost if one loses.

A．Cheerful people are more likely to suffer from mental disorders.
B．Cheerful people will arouse anger in others and increase the risk of personal harm.
C．They try too hard to be happy often ended up leaving people feeling more depressed than before.
D．Happy people are always blamed for too cheerful.

A．it is very relaxing
B．it is more sophisticated than dance music
C．it is good for one’s brain
D．it is helpful in reducing stress