I agree the answer is "C" It typically has multiple themes that are explored more deeply.
It could be said that Annie´s tone (lines 121-149) tends to reflect her attitude towards her situation and the people around her so in this case she sounds upset about Helen situation and it seems that she is not able to control her.
Chaucer uses satire in his characterization of the Pardoner to criticize the Church. The Pardoner's sermon against greed humorously contrasts with his exaggerated greediness. Chaucer creates such an excessively greedy character to draw attention to real corruption in the Church and to bring about change.
