Idea [im_idea_core] is directly extended from which table?

According to the ServiceNow documentation1, the Idea [im_idea_core] table is a base table that is not extended from any other table. It stores information about ideas and their categories. The other options are incorrect because:

Task: The Task table is a base table that is extended by many other tables, such as Project, Demand, Incident, etc2.

Idea Modules: The Idea Modules table is a child table of the Idea [im_idea_core] table that defines the idea modules displayed on the Idea Portal3.

Project: The Project table is a child table of the Task table that stores information about projects.

1: https://docs.servicenow.com/bundle/vancouver-it-business-management/page/product/demand-management/reference/r_IdeaTable.html 2: https://docs.servicenow.com/bundle/vancouver-platform-administration/page/administer/table-administration/concept/c_TableHierarchy.html 3: https://docs.servicenow.com/bundle/vancouver-it-business-management/page/product/demand-management/reference/r_IdeaModulesTable.html : https://docs.servicenow.com/bundle/vancouver-it-business-management/page/product/project-management/reference/r_ProjectTable.html