Read the following context and choose the best option to answer the question.
Context: Today I went to the " Yamaka My Weekend " festival . While I was there , Casey and I ran into somebody we knew from junior high . Her name is Sarah .
Question: Why is the narrator feeling nostalgic after going to the concert ?
Options: 
- None of the above choices .
 - The narrator saw an old friend .
 - The narrator saw an old teammate there .
 - The narrator saw an old teacher there .


The narrator saw an old friend .