"potent scent" instead smell, "went wild with hysteria" instead of wild laughter, there is a mistake it should be "grand finale" not grand finally.
simple, would be the correct answer
(context) plain means ordinary, primary means first and essential means is always needed.
(more context) even though you should do spell check it shouldn't be first and isn't always needed and part of spell check is to make it so it's not plain
I found this for your question
