Which of the following definitions describes an extension in SAP Commerce Cloud?

It is an encapsulated functionality that can contain business logic, type definitions, a Web application, and back office configuration.

It is a personalization option that enhances the SAP Commerce Cloud standard logic.

It is a prepackaged integration setup that enables SAP Commerce Cloud to integrate with other tools.

It is a side-by-side app integrated within the SAP Commerce Cloud core component.