Refer to the input text as context and select the correct relationship between 'Volvo' and 'Truck' from the available options.
Options: brand, product/material produced, founded by, owner of

In what was then the largest environmental enforcement case in U.S. history, companies including industry leaders Caterpillar Inc., Cummins Engine Co., Mack Trucks and Volvo Truck Corp. agreed to pay $83.4 million in fines and reprogram the computers.
product/material produced