I, too, chose the "none of the above" answer.

In addition to the links already posted by other contributors, here is a third one:

"Microsoft has estimated the entire impact of TDE on a SQL Server instance to be 3-5% depending on the server environment and data volume." (reference: http://www.simple-talk.com/sql/database-administration/transparent-data-encryption/[/url])

In my opinion, 3-5% is far from "a great impact". The statement is partially true, partially false, and since there was no "both" or "it depends" option, I chose "none of the above" as the most correct choice.

A good but somewhat flawed question. If it can be changed to read "This could have some performance effect for other unencrypted databases", it would be a great question.