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: David Cameron is drawing up contingency plans to make sure the UK is 'as prepared as we can be' if Greece crashes out of the eurozone, Downing Street has said. The Prime Minister's official spokesperson revealed that while the Government will not give specific details of the plans, it would include potential impacts on business, the banks and financial sector and tourism. Meanwhile, as the Greek government and its international creditors try to thrash out a last-minute deal, the country's central bank has issued a stark warning that it could be on a 'painful course' to default and exit from the EU as well as the eurozone.Downing Street reveals UK is 'as prepared as we can be' if Greece defaultsGovernment's 'Grexit' strategy being led by TreasuryBoE Monetary Policy Committee warned of 'significant risk' in June meetingBanking stocks in Greece loose 15 per cent in three days as crisis deepens 
 Question:'Within those discussions there would be an opportunity for the UK to secure meaningful changes and opt-outs that ensure a reformed _ aids our competitiveness.'

EU