Which of the following statements is most correct? Contagion occurs when the failure of one financial institution leads to the failure of another. The debt-to-GDPratiois not a good measure of its debt burden. The total amount of debt that a country has is amore meaningful measure. The mortgages held by investment banks during the financial crisis were considered to be 'toxic assets The market turmoil in 2007-2008 was caused partly by banks lending to underqualifed borrowers. More than one of the answers is correct.