C: Chanticleer is telling the fox he (Chanticleer) will not fall for the fox's flattery a second time.
Explanation:
Geoffrey Chaucer's "The Canterbury Tales" is a collection of stories told by the pilgrims on their way to Canterbury. this collected stories are being told by the pilgrims who are from all sorts of background and social standing.
In "The Nun's Priest's Tale", the story tells of a rooster and a fox who had fooled each other. Chanticleer the rooster had been caught by the fox and being taken to the forest. But Chanticleer wittingly made the fox open his mouth to spite the old woman when he escaped. The passage is Chanticleer telling the fox that he may be fooled once but he cannot be fooled twice. he is telling the fox that he will not be a victim of his flattery for the second time.
It is true that people with good eyesight fail to see what is right in front of them. This is probably because they try to focus on distant objects and often ignore the things that come in their view before them.
