The crisis wiped about 20 billion euros ($22.4 billion) off VW’s market value this week, forcing Chief Executive Officer Martin Winterkorn to step down on Wednesday as the scandal widened and opened the door for the exit of other top executives.
Take context from the input text and decide on the accurate relationship between 'Martin Winterkorn' and 'Chief Executive Officer' from the options provided.
Options: manufacturer, brand, position held, currency