Utilize the input text as a context reference, choose the right relationship between eurozone and euro from the options. Options: 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