Which of the following statements is correct in the context of migrating a schema from...

If you import a schema into a document type that already contains a schema, the import will be successful and the schema will be updated with the missing field.

If you import a schema into a document type that already contains a schema, the import will fail only if documents were already uploaded.

If you import a schema into a document type that already contains a schema, the import will fail.

If you import a schema into a document type that already contains a schema, the import will be successful and the schema will be overridden.