Definition: In this task, you will be presented with a passage and have to answer a question based on your understanding of the events inferred from the passage. Try to find the best answer that is most likely to fill in "_". Note that the URLs in the text have been replaced with [Link].
Input: England's population is up 565,000 in the past three years because of a fresh influx of migrants, experts said yesterday. The migrant population in England is estimated to have increased by more than half a million in three years, research from the University of Oxford has revealed. Around two thirds of the 565,000 migrants thought to have come to the country between 2011 and 2014 were born in other EU countries, the study by the university's Migration Observatory said. Today the former head of the European Commission taunted David Cameron over this issue and said it was 'impossible' for Britain to reverse the trend.New Oxford research reveals every region has seen increase in migrantsOf the estimated 565,000 increase a third came from outside the EUMajority of England's newest population went to London and south-eastBut north-east, Yorkshire and Humber say largest percentage increasesPrime Minister had promised voters to cut net migration: 'No ifs. No buts'Institute for Fiscal Studies says migration causes cuts to council spending 
 Question:The news piles more pressure on _, whose promise to curb immigration has been shattered,.

David Cameron