Questions 9 and 10 are based on the following news. At the end of the news item, you will be given 20 seconds to answer the questions.
Now listen to the news. In the experiment, the subjects were asked to read the following statements concerning all EXCEPT______.

A．They indicate class and status.
B．They are trip-wires for everybody.
C．They should be known by all.
D．They are complicated and dull.

A．one’s emotions can influence one’s facial expressions
B．the frown-free people will never feel sad or angry
C．one’s facial expressions can influence one’s emotions
D．people can control emotions by frowning more often