According to the text, two researchers who studied Twitter traffic in relation to political

upheaval in Egypt concluded that:

a. Twitter posts contain more emotion and opinion than traditional news messages.
b. Twitter posts contain less emotion and opinion than traditional news messages.
c. Twitter posts actually caused the turmoil in Egypt.
d. Twitter posts were responsible for a “spiral of silence.”
e. Twitter posts helped to prevent a “spiral of silence.”

a.