Answer: C
Explanation: Not all the small details are needed but a basic idea of the Main Idea along with larger more important details is what really makes a good summary.
Basically the subject is what it’s about, like say you were reading about art the subject of the passage is art
In research papers, visuals should be a, carefully chosen to contribute to the document's purpose. If you want to use visual aids for your research paper, they should directly relate to the topic and be appropriate. Visual aids are important because they add more understanding to your topic. Hope this helps.