Question

Which of the following sentences is written correctly?

Add a little butter to the pan [you could use olive oil as a substitute, if you like].

Add a little butter to the pan, you could use olive oil as a substitute, if you like.

Add a little butter to the pan--you could use olive oil as a substitute, if you like--.

Add a little butter to the pan (you could use olive oil as a substitute, if you like).

Answer 1

my guess is the last one

Answer 2

The correct answer is: add a little butter to the pan (you could use olive oil as a substitute, if you like).

I hope this helps:)