The correct answer is newspaper article.
A secondary source of information is one that was created later by someone who did not experience first-hand or participate in the given events.
A primary source is a source of information that was created at the time under study.
A newspaper article is a piece of information written after an event had taken place. It is usually written by a person who did not witness that particular event himself, but was only given the information to write about.
An interview or an autobiography is usually written by the author himself.
