You created an event subscription via the Core API and it returned a page identifier of "170322-439 0"

You created an event subscription via the Core API and it returned a page identifier of “170322-439 0” along with the subscription ID.
However, when you run a subsequent “Get Events” request using that subscription ID and same page identifier, the following is returned within the JSON-formatted response:

What is a valid reason why the “items” parameter is empty?

A. There are no new subscription events as of the specified page identifier.

B. The Core API “Business Events” parameter is set to “hidden” within the Application being used for API authentication.

C. No relevant events were specified within the body of the request

D. The Core API “Collaboration Events” parameter is set to “hidden” within the Application being used for API authentication.

Correct Answer: D