Read the following context and choose the best option to answer the question.
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 ?
Options: 
- The work they were doing was easy going on the hands .
 - The work they did required that their hands be very callous .
 - The work involved washing their hands with soap and water .
 - None of the above choices .


None of the above choices .