What is the relationship between eurozone and euro in the context of the input sentence. Choose an answer from: product/material produced; manufacturer; distributed by; industry; position held; original broadcaster; owned by; founded by; distribution format; headquarters location; stock exchange; currency; parent organization; chief executive officer; director/manager; owner of; operator; member of; employer; chairperson; platform; subsidiary; legal form; publisher; developer; brand; business division; location of formation; creator.

Schaeuble, who has driven a tough bargain throughout the crisis with Athens, called an agreement reached Friday among the eurozone finance ministers "responsible" and "in keeping with the commitments made at a euro summit in July".

Answer: currency