The word "slump" in the first paragraph may be replaced by______.

A．Motorola will be successful
B．the technology offered by Motorola will be selected by its competitors
C．its competitors will want to buy the technology from it
D．its mobile phones contain a variety of chips

A．In the new teachers' classes, pupils seem to ask questions more freely.
B．Pupils seem to be quite satisfied with amount of time their teachers spend with them between classes.
C．The evaluation of the middle-standing teachers is lower that that of the veterans in seven items.
D．Though veterans rarely play games with pupils during breaks, their teaching is rated highly.