A Good Example of a Secondary Source in Historical Research

A good example of a secondary source in historical research would be

A) an eyewitness account.
B) the diary of a participant.
C) an official box score of a baseball game.
D) an academic journal article that summarized or reviewed an account of related information published in earlier academic journals. As a result, "first hand" or original research was not reported in the journal article.
E) All of the above.