According to the passage, the decisive factor in maintaining a firm’s competitive advantage is______.

A．Looking for an apartment.
B．Looking for a job.
C．Taking a suburban excursion.
D．Asking the man for his opinions.

A．They feel that everything on the screen is familiar to them.
B．They are touched by the life-stories of the actors and actresses.
C．They try to turn their dreams into reality.
D．They become so involved that they forget their own problems.