You Have Been Tasked to Develop a Solution That Will

You have been tasked to develop a solution that will notify an external system when updates are made to certain documents. These documents can be of any type and the content authors will make the decision if the document needs this "notification" functionality. Select the simplest combination steps that will implement this solution.

A) Define a new "notify" aspect with a "multi" peer association. Create and register a policy behavior that, when content is updates, users can associate their content via this aspect. As associations are being made, the external notification request will be triggered.
B) Define a new "notify" aspect with no properties. Create and register a policy behavior that, if this aspect is present, will make the external notification request. Users can simply add this aspect to their content item.
C) Extend cm:content to provide an additional "notify" property. Create a policy behavior that will look at the "notify" property and, if set, make the external notification request. Users simply create cm:content items.
D) Extend sys:base to provide an additional "notify" property. Create a new policy that will look at the "notify" property and, if set, make the external notification request. Users can simply call an action against their content item.