Read the source of the allusion.
In the fable "The Fox and the Grapes," a fox tries unsuccessfully to reach a
bunch of grapes. Because he cannot reach them and therefore cannot eat them
he tells himself that they must be sour.
What is the meaning of the allusion in the sentence below?
Jackson's remark about your new car is clearly a case of sour grapes.
A. disliking something that you find unpleasant
B. criticizing something because you can't have it