Good question. Too bad you did not include a reference in the explanation.

For those who want to double check (and to see HOW those system databases can be moved), here is a reference: http://msdn.microsoft.com/en-us/library/ms345408.aspx

True. But it is, unfortunately, not possible to submit a question with only one correct answer as a multiple choice question. The software automatically decides on single choice vs multiple choice based on the number of correct answers.