Eurogroup chief Jeroen Dijsselbloem insisted on the need to build trust after six months of tortuous debt deal negotiations and a sudden referendum in which Greeks overwhelmingly rejected creditors' bailout terms.
Utilize the input text as a context reference, choose the right relationship between 'Eurogroup' and 'Jeroen Dijsselbloem' from the options.
Options: position held, chairperson, subsidiary, creator