a little help with a paper topic!

I am in a European seminar class and have to write a thesis on post WWI Europe 1919-1923/Paris Peace Conference/Treaty of Versailles. The paper should involve political/border changes or clauses in the treaty, or some other related subject. I was thinking of writing about the proposal and denial of czech corridor, the economic isolation of east prussia and konigsberg, the transfer of the memeland/klapedia region, or the transer of bosilegrad to romania. which topic do you think could be expressed most concisely and precise in a 30 page paper?