D. answers the 5 W's and H.
Who - He
What - Gave penances and absolution
Where - wherever he thought he could get gifts
When - whenever a group receives gifts
Why - to receive absolutions for his sins
How - if a high enough price is given, the penitent person would truly feel sorry for what he had done.
The answer is D, because it is a known fact that is it mandatory for children to go to school.
She doesn't want him to know