Answer is D. The storyteller allows the audience to participate with cheers and applause.
To create a "group storytelling experience", the performer must connect with its audience. Since its in a group, they can participate together and make the performance more exciting to watch.
B and C are both incorrect since these are details on how the story is given, but does not play a factor in a group setting in particular. This would have some effect on just an individual.
A. Is not correct since the crowd is just watching and would be most likely bored.
Nothing. Their duty is to guard the tomb and there should be no reason at all to when they stop. When changing guards maybe but someone is still there watching.