To make a cheer dance routine in a solo performance I would still do the usual sections a group routine has, without the ones that are done with a partner. For example, I would have an opening to show my abilities, then I would do a standing tumbling sequence and finally different jumps. I would mix all these sequences with different dance moves.
The forth wall acts as a barrier between the fictional world and the real world. I would believe the answer to this is C, the characters speak directly to and interact with the audience.
