Define the essay's purpose Determine the essay's point of view
The only conjunction in this sentence is C) but.
All of the other options are prepositions, not conjunctions.
This question is for you not for other people. You're the one with memories, this is personal information about you. No one online can help you answer that. This is one from you.
As an English speaker the advice i give to someone who wants to learn English would be it does take time but it's actually not that hard to learn English you just need to keep practicing and try to talk with the words you know so you can get used to it.