The answer is C: write and rehearse stand-up comedy routines and research night club audiences and performers to prepare for an audition with Daphne.
Public speaking is an activity that involves confidence and, like any other activity, it can be perfected. Although some may have certain apparent innate skills conducive to public speaking, it, nonetheless, can be an acquired, learned, and perfected skill. As such, all of the options above would be conducive to a betterment of public speaking and gaining confidence in front of a crowd (even option b, where imagination is solicited, since imagining oneself succeeding at something can improve one“s own self-esteem making it easier to deliver). Answer C is not an option since it is only related to preparing and rehearsing a routine for an audition, so it does not meet the criteria above.