Which two capabilities of Salesforce Knowledge ensure accurate content in Articles? Choose 2 answers

Which two capabilities of Salesforce Knowledge ensure accurate content in Articles? Choose 2 answers
A . Data Category to assign an Article Type to a Reviewer
B . Validation Rules for Article Types to verify all fields during creation
C . Knowledge Action to Publish an Article once the Article is approved
D . Approval Process that assigns an Article to a Reviewer Queue

Answer: A,B