I have a Fulbright interview at the end of March, and have been advised that this type of question will be asked. I'm not really sure what type of response to give...any ideas?!

I think this is the question you have to answer also in your motivation letter. It depends on where are you from...I'm thinking about the same thing...Try to think of the problems (legal, political, cultural) which your country is facing and find the connection between the areas of law which you want to specialize in with the LLM and between these problems.

Hope I helped you a bit. Where are you from, if I may ask?