Answer:
A.
Explanation:
The Sixtieth Birthday is the occasion, K.R. is who it's for (who it relates to, it's her sixtieth birthday)
It seems that you have missed the necessary details for us to answer this question, but hope this would help you. The line in the given passage that is considered a flashback is this: <span> She thought of her last day in middle school, seven years ago, when Sarah had given her an iPod. Have a great day!</span>
The answer is that it's unified.
I'm guessing past imperfect isn't enough information?