Among the following cities, the wind direction will not change in______.

A．the students at the Florida Virtual School hail from places in or out of the U.S.
B．the students at the online schools can take classes at any time
C．the online schools provide a variety of training from tennis to music
D．among the students of Florida Virtual School, there are some very advanced or backward ones

A．with her friends
B．with her colleagues
C．in the classroom
D．in an E-mail message sent to her students