What is the significance of the prisoners cleaning their barracks just one hour before evacuation?

Question

a
The prisoners wanted to hide the evidence.
b
The kapo in charge of their barracks was unusually cruel and ruthless.
c
It was yet another cruel insult they felt from God.
d
Even in their darkest moments, the prisoners attempt to assert their humanity

Answer 1

d
Even in their darkest moments, the prisoners attempt to assert their humanity.