Read the following context and choose the best option to answer the question.
Context: He commented that he was sure it was still three , but there were still many hours in the day . I chuckled , amused at my mentor 's slight disorientation , assuming that he 'd just spent too long on a certain puzzle . I thought nothing of it - everyone is allowed to let time slip away . Considering the future , I rather wish that I had spent more time with him while he still understood the aspects of time . Stage two .
Question: Why is the narrator being very patient with the subject ?
Options: 
A. They are trying to teach them .
B. They are normally patient .
C. None of the above choices .
D. They realize it 's an older person .


A