Which of the following would be considered expert testimony in the world of politics and, therefore, more valid than opinion?

A. According to a watchdog group, Sara has a 99% rate of returning citizen phone calls and should
be elected.

B. According to her grandmother, Sara finds helping people to be the most rewarding part of her life
and should be elected.

C. According to one of her neighbors, Sara cares about the people she represents and fights for
what they believe in and should be elected.

D. According to the governor, Sara has never given up on anyone who needed her help and should
be elected.