Read the sentence below.
The recipe instructed Trevor to wash his hands, preheat the oven and gather the ingredients before beginning to make the cake.
Which of these correctly edits the sentence for punctuation mistakes?
The recipe instructed Trevor to wash his hands, preheat the oven, and gather the ingredients before beginning to make the cake.
The recipe instructed Trevor to wash his hands preheat the oven and gather the ingredients before beginning to make the cake.
The recipe instructed Trevor to, wash his hands, preheat the oven and gather the ingredients before beginning to make the cake.
The recipe instructed Trevor to wash his hands, preheat the oven, and gather the ingredients, before beginning to make the cake.