Will give 65 (almost all my potnts) to any who will answer this quick

what does the interaction between mathilde and madame forestier reveal?

a: the necklace mathilde borrowed from madame forestier was made of paste.

b: mathilde knew all along that madame forestier was not as rich as she claimed to be.

c: madame forestier looks down on mathilde because she belongs to a lower class.

d: madame forestier thinks the necklace mathilde returned to her is fake.