In this conversation, which group discussion technique does Jennifer most clearly show?

JENNIFER:
All right, today we're discussing Five Doors Down by Len McGill. Has everyone read it?

DANIEL:
Sure did. Twice actually . . .

ANNA:
Yup. I had a lot of notes on this one. [Holds up paper.]

JENNIFER:
Wow, way to be prepared, guys. Why don't we start with the symbolism of the door? I think it seemed pretty essential to the storyline. After that, we can move on to other moments in the story. We might disagree, so let's just remember to keep things polite. Sound good?
A. Using evidence to support opinions
B. Challenging ideas
C. Returning to the text
D. Outlining a discussion plan