What is the relationship between 'EU' and 'European Union' in the context of the input sentence.
Options: operator, subsidiary, chief executive officer, manufacturer

With Greece due to pay the European Central Bank 3.5 billion euros ($3.9 billion) next Monday, ministers are looking at whether they could recycle interest payments already made by Greece to euro-zone central banks, tap a fund managed by all 28 European Union governments, give Greece more time to pay, or organize bilateral loans from individual EU governments.
operator