Read the following context and choose the best option to answer the question.
Context: For a second , he looked surprised but he recovered quickly . " Uncle ... I do not know which time you are referring to . Probably you are assuming that the things are same as you saw two decades back when you left India .
Question: Why is the uncle confused about where he is ?
Options: 
A. The narrator tried to trick him .
B. He is having a nightmare .
C. None of the above choices .
D. He is elderly and is experiencing dementia .


D