How should the Salesforce Administrator accomplish this?

The Salesforce Administrator at Universal Containers has set up Topics. Universal Containers is going through a rebranding phase and wants to simplify Topics, but keep Articles that have been assigned to the Topics.

How should the Salesforce Administrator accomplish this? Select one or more of the following:
A . Merge similar Topics in Content Management Workspace
B . Keep existing Topics and reassign Articles to newly created Topics
Delete existing Topics and assign Articles to newly created Topics
Mark old Topics as Inactive and assign Articles to the new Active Topics

Answer: A