The correct answer is A.
Greek public debt reached spectacular figures. The Greeks could not access to funding by themselves, because the risk premium attached to it was so high that the country could not afford to pay the very high interests required by every financial institution that could provide financing to the government. Therefore, the European Union had to conduct several bailout programs, in 2010, 2011 and 2015. In the end, the union became holder of part of the Gree debt and established new and softer repayment systems.
