A. Creating a policy is a subsequent action enabled by defining an instance; the core purpose of the definition itself is differentiation, not the act of policy creation.
C. The instanceid attribute is a feature that leverages App Instances for queries. The reason for defining the instance is for policy control, not merely to enable a search parameter.
D. Google Drive and Box are entirely different applications. The system distinguishes between them at the application definition level, not through App Instances, which are for multiple accounts of the same app.
