Answer:
Use the change sets to migrate the new metadata and Data Loader to migrate the records.
Step-by-step explanation:
The Developers of the Universal Containers have done an excellent job of creating a new custom objects and the fields in the sandbox. They have also created records for the new custom objects. The administrator must used the change sets for the new metadata to migrate and the Data loader in order to migrate all the records, so that he can move all these objects and records to the production environment.