Ahh ... on weekends we need to input a PIN code on top of scanning . Well , let 's input the PIN ... Normally when I do this , I can hear the doors unlocking immediately . This time there was no response .
According to the above context, choose the best option to answer the following question.
Question: Why do they need to input a PIN code ?
Options:
- They need to input the code because it 's Tuesday .
 - They need to input the code because it 's Wednesday .
 - They need to input the code because it 's Saturday or Sunday .
 - None of the above choices .


They need to input the code because it 's Saturday or Sunday .