Headquartered in London, Worldpay was carved out of RBS (LSE: RBS.L - news ) five years ago and established as a standalone business by private equity firms Advent International and Bain Capital - who paid £1.7bn for the business.
Take context from the input text and decide on the accurate relationship between 'Worldpay' and 'Bain Capital' from the options provided.
Options: employer, chairperson, currency, parent organization