Utilize the input text as a context reference, choose the right relationship between 'Exxon' and 'diesel' from the options.
Options: position held, product/material produced, owned by, parent organization

Volkswagen's diesel emissions rigging scandal in the United States could reverse the fortunes of refineries with high gasoline output such as Valero's 220,000 barrel per day (bpd) Pembroke refinery in Wales, which has a 49.4 percent gasoline yield, and Exxon Mobil (Swiss: XOM.SW - news ) 's 273,000 bpd Fawley refinery in southern England, with 41.6 percent gasoline yield, according to consultancy Wood Mackenzie.
product/material produced