Explanation
D: A workflow consists of one or more steps. Each step defines a task that is assigned to a user or team of users, and the task assignment appears in the user's Inbox in Knowledge Advanced.When the task is completed, the user can either:
E: A workflow process is a sequences of steps, such as creating, editing, translating, reviewing, and approving, that you can define to enforce specific content management procedures for your organization.
References:
Oracle Service Cloud, Knowledge Advanced Administration Guide, November 2016, page 4

Explanation
In order for answers to appear on the customer portal, the Status, Access Level, Language, Product, andCategory fields must be set to a visibility that allows access by customers. If even one field does not allow visibility, the answer will not be available on the customer portal.
References:
https://docs.oracle.com/cloud/november2016/servicecs_gs/FAABU/_BUIGuide-9.htm

Explanation
You can filter the Manage Tuning Request list to display only active requests or only archived requests.
At the Status drop-down menu on the Manage Search Questions screen, select one of the following options:
References:
Oracle Service Cloud, Knowledge Advanced Administration Guide, November 2016, page 45