Final answer:
The best paraphrase that demonstrates the reader's understanding of the passage is option C: Readers who paraphrase can confirm their understanding of the text.
Step-by-step explanation:
The best paraphrase that demonstrates the reader's understanding of the passage is option C: Readers who paraphrase can confirm their understanding of the text.
Paraphrasing a text helps readers assess their comprehension by restating the information in their own words. This process allows readers to check if they have truly understood the meaning of the original text. By paraphrasing, readers can confirm their understanding of the text and ensure that they have interpreted it correctly.