【单选题】The author points out the rise of mass media of communication is a complex factor, because
A.
a lot of people like the mass media and it has great influence on people's mind.
B.
the mass media is a success and it requires creative efforts to be made.
C.
the mass media is the most effective, modern way of circulating information.
D.
the mass media aims at the median I. Q. and this fact kills the creative intelligence of people who work in this field.