The underlined word "media" in the first paragraph includes ______.

A．it is important to be successful in teaching the young
B．enough salaries are necessary in making quality people become teachers
C．greater progress has to be made in teaching
D．teaching is a product of the society's division of labor

A．show the importance of teaching as a job
B．attract more qualified people to become teachers
C．make teachers "responsible" in their teaching
D．improve the quality of public teaching