Take context from the input text and decide on the accurate relationship between 'eurozone' and 'euro' from the options provided.
Options: position held, currency, original broadcaster, distributed by

Predictions of a close result were proved badly wrong from the start of counting on Sunday night with around 60 per cent of Greek voters ignoring warnings about their country's membership of the euro and backing the 'No' campaign against five years of unpopular economic reforms imposed by Greece's eurozone creditors.
currency