Hopes this helps:
Answer: C. Rachel Carson
<span>Al-Khwarazmi made algebra
</span>
If the movie is perhaps a documentary, then it is telling you factual information of actual events (includes pictures or pictures of actual documents or events); this makes it a primary source.
If the movie is based off of real events, has factual information, but also has added information to create a well-rounded plot, this makes it a secondary source.
I believe the correct answer is the third one.