Read the following context and choose the best option to answer the question.
Context: The variety was too overwhelming . We passed orchards and orchards of neatly planted orange trees on our way back to the border . Again , the green ! At the border , the sound of Portuguese , the feel of pushing in line , and stepping on a discarded chicken bone in front of the immigration officer 's desk reminded me where I was .
Question: What may be the reason why they needed a reminder of where they are ?
Options: 
- None of the above choices .
 - They are blind and the sound reminded them .
 - They have a mental disorder .
 - They are too young to comprehend what this new place is .


None of the above choices .