Which of the following is an example of a secondary source?

A documentary film about a historical event qualifies as a secondary source because it typically compiles, interprets, and presents information from various primary sources, such as interviews, official documents, and original research. Secondary sources analyze and synthesize information rather than presenting firsthand accounts or original data. In the case of a documentary, while it may use primary sources, its main purpose is to provide an overview, context, and interpretation of historical events rather than to serve as an original document or firsthand evidence itself.

The other choices represent primary sources or original research. A personal interview with an eyewitness directly collects firsthand accounts and experiences. An original research study presents data and findings that have not previously been reported and thus offers new contributions to knowledge. A statistical report based on survey data presents the data gathered directly from respondents, which qualifies it as primary data. Each of these options contributes original information or firsthand evidence, distinguishing them from secondary sources like the documentary film.