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 .

Question: Why do they need to input a PIN code ?
Answer: 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 .