I believe the answer is c
Answer:
The researchers discovered a negative relationship between mobile phone usage and students' academic performance, such that every 100 minutes that a student spent using their phone a day lead to the student dropping 6.3 places in terms of their academic school ranking.
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Answer:
The author's main point may not be conveyed if the document is disorganized. Because that is the primary goal of the document, it must be organized.
Explanation:
Change some words to avoid plagiarism. :)
You would use a First-Person plural mode of address.
hope this helps :)