Answer:
D. to convince readers that the spread of false rumors cannot be prevented as people have a right to freedom of speech
Step-by-step explanation:
Considering the text that you provided I have made an educated guess the the answer to your question is in-fact D. to convince readers that the spread of false rumors cannot be prevented as people have a right to freedom of speech.
Also: In the first paragraph you will find exactly what your looking for.
Have a good day, and good luck on your test!