Take context from the input text and decide on the accurate relationship between 'Volkswagen Group' and 'Porsche' from the options provided.
Options: currency, subsidiary, manufacturer, founded by

Meanwhile, Poetsch worked in the background, ensuring that Volkswagen Group had the financial means to absorb bold acquisitions masterminded by his fellow Austrian, Piech, such as the purchase of truck makers MAN and Scania , sportscar maker Porsche and motorbike maker Ducati .
subsidiary