Answer:
A
Step-by-step explanation:
The source that is an example of a primary source is option A - a video of an interview with someone who was on the Titanic. A primary source is a firsthand account or original document from the time period being studied. In this case, the video provides a firsthand account of someone who experienced the sinking of the Titanic. Options B, C, and D are all secondary sources because they analyze or interpret primary sources rather than providing firsthand accounts.