In His Examination of More Than 1,100 Political Commercials, What

In his examination of more than 1,100 political commercials, what did communication scholar Dr. Larry Sabato conclude?

A) To communicate political truth, an advertisement must be positively packaged.
B) At least 75 percent of all commercials in recent campaigns have been negative.
C) Political advertising is becoming increasingly negative.
D) Candidates who choose to support their own records in ads are not as successful as those who attack the records of their opponents.