A trustee does what is best for the people rather than what the people want

What is one reason why incumbents have the advantage in elections?

a. Challengers have more time to campaign than do incumbents. b. Each challenger has to petition for inclusion on the ballot, while the incumbent does not. c. Mainstream media outlets are required by law to provide free airtime to incumbents. d. Incumbents have staffers who provide services that help them win reelection.

Which of the following is concerned with monitoring estimates of present performance and

predictions of future performance? a) content validity b) criterion validity c) construct validity d) internal validity