Task: Wrong Candidate Generation
Input (English): Context: Chuck 's trying to get an appointment today . We 're not really sure what the deal is . She seemed fine for a while but the past day or so she 's been acting funny and peeing outside of her litterbox again . We changed to a new type of litter and since then she 's been going in the litter box again , but at this point we figured it 's probably a good idea to take her in for a test this time to make sure that there 's not something wrong with her . 
Question: Why do they likely think something is wrong? 
Correct Answer: None of the above choices .
Output (English): There is an awful smell in the house.