The paragraph reveals that Don Quixote reads so often that he is losing the ability to discern what is real and what is fanciful, as shown in option B.
The third paragraph describes Don Quixote's obsession with chivalric romances and his tendency to mistake reality for fiction. He is so consumed by his imagination that he believes he is a real knight-errant, even though he is just a simple countryman.
This suggests that his excessive reading has clouded his judgment and made it difficult for him to distinguish between the real world and the imaginary world of his stories.
So, The correct answer is B. reads so frequently that he is losing the ability to discern what is real and what is fantasy.
See text blow
The third paragraph mainly reveals that Don Quixote
O A. was part of a group of soldiers who tried to overthrow the king
B. reads so frequently that he is losing the ability to discern what is real and what is fantasy
C. argues with an educated person from the village
D. doesn't have strong opinions about specific knights, despite being interested in that period of chivalry