Answer:
D. It demonstrates how social media has the capacity to spread information faster than traditional outlets.
(Photo for proof at the bottom.)
Step-by-step explanation:
The passage stated that social media has the capability of disseminating, or spreading breaking news, in the sentence, "Earlier PEJ research finds the role of Twitter in disseminating breaking news is not limited to the Arab uprisings". Then the passage tells an example of social media spreading breaking news 55 minutes faster than the major news channel, the AP. This is told in the sentence, "the death of Whitney Houston, for example, was announced on Twitter 55 minutes prior to the AP confirming the story."
Here's a photo for peace of mind. I wish you luck on Edge.