C. Experts disagree about whether online writing has helped or hurt students' writing skills overall
Explanation:
Option C is the best option that synthesizes information from both sources.
This is true because in Source 1, we see that Nakamura actually pointed out that the internet has affected the writing skills of students. But in Source 2, Linda Idris tends to disagree with that. Idris tend to point out the positive impact that online writing has made in students.
We then discover that there tends to be a disagreement from both sources about whether truly online writing has helped or hurt students' writing skills overall.
