A newspaper publishes an article attacking an American politician, accusing him of taking bribes, blackmailing police officers, and spying on citizens. Which of the following, if true, would most likely indicate that the article was biased against the politician?

AIt was written by a person who saw the politician commit the crimes.
BIt was written by one of the politician's most bitter political enemies.
CIt was written by one of the politician's former college professors.
DIt was written by a journalist who supports her claims with photographs.