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Obviously she was nervous, but let's not pretend she's a genius either.
She's coached to deal with pressure and these questions. And they didn't exctly ask her for a unified theory of physics. It was a pretty damn easy question.
She could have just said "more emphasis on geography" and then added, "for the children" or whatever fluff.
And the reason these questions are asked, is to make at least a passing attempt at inner beauty and intelligence, and weed out the complete airheads.