Rhys Is Giving the Keynote Speech at a Conference on Social

Rhys is giving the keynote speech at a conference on social media's impact on global news and communications. During his presentation, he encourages audience members to comment, ask questions, and engage one another in conversation via Twitter. Rhys is using a process known as

A) online tools.
B) concurrent conversations.
C) information dissemination.
D) backchanneling.
E) hashtagging.