Are you here to post the answer? Because at the end of your question is the right answer. The answer you are looking for is a: "Story within a story."
<span>C is the correct answer. Answers A, B and D are all written in passive voice, which can be pinpointed with the use of the ‘by phrase’, for example, ‘the part in the musical was hoped for [by Kylie]’. Such by phrases can be omitted in a passive and the phrase will still make sense.</span>