After 5 days of fantastic space trip ,the two astronauts walked out of the spaceship, ______.

A．tired and happy

B．tired but happy

C．tiredly and happily

D．tiredly but happily

下列说法正确的是( )。

A．定活两便储蓄存款的利息要比活期存款低

B．个人通知存款可以按照储户需要随时支取

C．教育储蓄存款的利息征税税率为20%

D．教育储蓄存款本金最高限额为2万元