A parable is an account of a simulated or a fictitious event from which an important truth, a moral teaching or a religious principle are inferred by means of a comparison. Among the options that you have been given, I would contend that the most suitable one is the C: It portrays people realistically. The work does refer to biblical characters, it has religious connotations, and it features a particular rhyme scheme, but, as a parable, it aims at presenting information in a simple, understandable and convincing way, and it does so by portraying the various biblical, historical and mythological figures succinctly, accurately and realistically.
