Which of these is used after a printed word or quote to show that it has been copied exactly from the source?

I had always wondered what [sic] meant! Now I know. Thanks, Quizzland!

I asked my senior year in high school literature teacher to explain "sic" and she said she had never heard of it

When I was going to Catholic school in my country, we have to say our prayers in Latin. Now I am trying to remember all those prayers.

This description is misleading. “Sic” means that a mistake is attributable to the source, not the person citing the source. None of this was captured in the definition given. I am not a happy camper!