Generally Speaking,it Would Be Negligent for a Reporter or Editor

Generally speaking,it would be negligent for a reporter or editor to publish

A) an Associated Press story without checking it out completely.
B) allegations that are supported by several credible source,but strongly denied by the subject of the story.
C) a story based on allegations that are made by a source who has been found to be unreliable in the past.
D) all of the above.