B. Flashback. They are talking about a past date which means its definitely a flashback.
the second one is the one that is right. because it show what type of writing they are using and the others were not right
I would say that the answer to your question would be A. because usually when you are reading a book or watching a movie, there is blank verse and 9 times out of 10 it is because something intensely romantic is about to happen.
HOPE THIS HELPED !