Utilize the input text as a context reference, choose the right relationship between EU and European Union 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.

European Council President Donald Tusk says he is more hopeful now that the European Union can deal with the refugee crisis after contacts with EU member states in recent days.

Answer: operator