I would say the correct answer is <span>B) Immigration, economic reform and unemployment rates post-recession, and political elitism and nationalism that created bipartisan within Parliament. According to the author, immigration wasn't the downright cause, but only a trigger in an atmosphere of rising nationalism, not only in Britain but throughout the world. Economic reform and unemployment rates after the recession have brought skepticism and distrust in European financial and political institutions. Thirdly and lastly, the author interprets Brexit as a consequence of resentment against political elites. Two parties (Labour and Conservative) officially wanted Britain to remain in the EU, but many people who had previously been supporters of these parties were for Brexit, which caused a great disunity.</span>