The average length of time presidential candidates are shown speaking without interruption (the length of their "sound bites") on television newscasts
a. has increased substantially during the past four decades.
b. has stayed the same during the past four decades.
c. has declined sharply during the past four decades.
d. increased until about 1990, and then decreased sharply.
e. decreased until about 1990, and then increased sharply.
Answer: c