Dunn's team also surveyed 16 employees at a company in Boston before and after they received an annual profit sharing bonus of between $ 3，000 and $ 8，000. “Employees who devoted more of their bonus to prosocial spending experienced greater happiness after receiving the bonus, and the manner in which they spent that bonus was a more important predictor of their happiness than the size of the bonus itself，” they wrote in their report, published in the journal Science.
They gave their volunteers $ 5 or $ 20 and half got clear instructions on how to spend it. Those who spent the money on someone or something else reported feeling happier about it.
“These findings suggest that very minor changes in spending allocations—as little as $ 5—may be enough to produce real gains in happiness on a given day，” Dunn said.
1．What is the general idea of the passage?
A．The more you earn, the greater happiness you will get.
B．Spending more money on yourself will make you happier.
C．If you spend money on someone else, you will feel happier.
D．You can spend only $ 5 a day on someone else to get happiness.
2．The underlined word “boost” in the first paragraph probably means________．
A．help to find B．help to bring C．help to increase D．help to get
