In the MongoDB Shell, what happens when the following command executes?

db$.$movies.insertOne$(\{$ name: "What About Bob?", year: $1991\})$

The document is not added to the collection without an $\_$id$.$

The document is added to the collection with a generated $\_$id$.$

The document is added to the collection with no $\_$id$.$

The MongoDB shell prompts for an $\_$id before adding the document.