You’re supposed to choose the right phrase to continue the exclamation. ‘How rude’ fits this best since the closest other option, option (C) ‘shame’ cannot stand on its own, it should be either ‘shame on you’ or ‘how shameful’. The same goes with awful, option (D) – it should be ‘how awful’. Option (A) is clearly incorrect because the statement is negative, not positive; which we can determine especially from the word churl – which refers to a mean-spirited person.
