Final answer:
Objective journalism is defined by its focus on presenting factual reports without bias, distinguishing clearly between factual reporting and opinion or editorial content.
Step-by-step explanation:
The term that best defines objective journalism is 'A.' Objective journalism distinguishes between reports and opinions. Objective journalism arose in the early 20th century with the goal of reporting facts without bias or partisanship. This is in contrast to other types of journalism such as partisan journalism, which openly biases towards a political stance, and yellow journalism, which emphasizes sensational stories to attract readers. Objective journalism aims to present information accurately and impartially, allowing the reader to form their own opinions based on the facts presented, without the influence of the journalist's personal beliefs or the editorial stance of the publication.