I was at a friend 's house a few days ago and I was feeling thirsty . " Is it okay if I help myself to the juice ? " I asked , peering into the fridge . " Sure , " said my friend .
According to the above context, choose the best option to answer the following question.
Question: What may be the reason for them asking permission ?
Options:
A. They felt guilty if they did n't ask permission .
B. They did n't want to upset their friend 's parents .
C. None of the above choices .
D. They wanted to respect their friend 's home .


D