Task: Wrong Candidate Generation
Input (English): Context: The wide sleeves of the black shihakushou gently fluttered in the air as the long arms swung back and front , the large hands still coarsely callused as ever . The footsteps were as always firm and steady , contrast to the almost hesitant - looking pace he walked up the stairs at . Nothing had changed yet at the same time , everything had changed . 
Question: What may be the reason their hands were callused ? 
Correct Answer: None of the above choices .
Output (English): The work involved washing their hands with soap and water .