I ' m always up for a wander around a graveyard at night . Bloody good fun . But OMG , it is STEEP in Scotland ! And there were a lot of drunk people in Edinburgh ( and I ' m talking drunk at 10 am ) . My parents got pissed off annoyed because there were drunk people yelling in the street at 3 am , but I did n't notice that .
According to the above context, choose the best option to answer the following question.
Question: What may be the reason for them not noticing the drunk people ?
Options:
A. None of the above choices .
B. They are used to drunks .
C. They were sleeping .
D. They were drunk too .


C