A. To subscribe to an event, the integration user in salesforce needs read access to theevent entity.

B. External system needs to have the same uptime in order to be able to keep up with Salesforce Platform Events.

C. To publish an event, the integration user in salesforce needs create permission on the event entity.

D. Salesforce needs to be able to store information about the external system in order toknow which event to send out.

E. Error handling must be performed by the remote service because the event is effectively handed off to the remote system for further processing.