{"question_id": "4c29a5c2009c9c0b", "user_name": "yulinggu", "user_reason": "Bad example. Not constrained enough for D to be the only right answer. Option A should also be correct. \nC + 2C + B = 25 (total animals)\nB > 3C (birds outnumber cats and dogs combined) so B = 3C + Y, for some Y\nC + 2C + B = 25 then becomes 3C + B = 6C + Y = 25. \nIf Y = 1, 6C = 24, C = 4. B = 12 + 1 = 13 (which is option A) ", "revision": "Louis owns animals in three categories: birds, cats, and dogs. He claims that he owns at least one of each and the birds always outnumber cats and dogs combined by 13. If Louis altogether has 25 animals and the number of dogs is double the number of cats, how many birds does he own?", "example_quality": "Bad"}