To determine which of the following is not a primary source, we need to understand the definition of a primary source.
A primary source is an original document or firsthand account of an event or topic. It is created at the time of the event or by someone who directly experienced or witnessed the event. Examples of primary sources include letters, diaries, photographs, speeches, and original research articles.
In this case, we are given the option "The 'John Brown' article from the Scholastic GO! Grolier online website." To determine if this is a primary source, we need to consider if it meets the criteria mentioned above.
Since the article is from the Scholastic GO! Grolier online website, it is likely a secondary source. Secondary sources are interpretations or analysis of primary sources created by someone who did not directly witness or experience the event. These sources can be useful for gaining a deeper understanding of an event or topic, but they are not considered original or firsthand accounts.
Therefore, the correct answer is "D. The 'John Brown' article from the Scholastic GO! Grolier online website" as it is not a primary source.