Refer to the input text as context and select the correct relationship between 'Eurozone' and 'Euro' from the available options.
Options: legal form, owned by, currency, member of

By adopting the Euro that it could not print, what Greece gained instead was vast amounts of credit from banks that assumed Germany would cover Eurozone debts to protect the Euro (which, as we have explained in past books, is really the German Deutschmark in disguise as Germany’s third attempt in the 20th Century to conquer Europe….this time economically).
currency