Explanation
According to the Citrix Cloud documentation1, a Citrix Administrator needs to supply the following information when creating a silent installation of the Cloud Connector:
* The customer ID of the Citrix Cloud account for which the administrator is installing the Cloud Connector.
* The client ID and secret of the secure API client the administrator wants to use to install the Cloud Connector.
* The resource location ID for the resource location that the administrator wants to associate with the Cloud Connector. If the administrator does not supply this value, Citrix Cloud uses the ID of the default resource location.
Therefore, the correct answer is C, Resource Location ID.
1: Install Cloud Connectors from the command line | Citrix Cloud