Lorna Is Giving a Speech on 3D Technology

Lorna is giving a speech on 3D technology. In her introduction, she states, "Just ten years ago, 3D technology was relegated to the back shelf because of its expense to produce. But with 2009's Avatar, all of that changed. Now, most of our top-grossing movies can be found in 3D format, and I'm sure you've seen at least one movie in 3D in the past six months". With this opening, what is Lorna trying to establish?

A) Her listeners' vested interest in the topic
B) The currency of her topic
C) Her listeners' doubts about the topic
D) The relevance of her topic to the listeners