—Lydia, what did our head-teacher say just now?

—Every boy and every girl as well as the teachers who _____ to lead the group _____ asked to be at the

school gate before 6:30 in the morning.

A．is; is

B．are; are

C．are; is

D．is; are

低市净率和低市盈率的股票，其价格被低估的可能性较低，而被高估的可能性则较高。（）