Refer to the input text as context and select the correct relationship between 'PACCAR' and 'truck' from the available options.
Options: product/material produced, director/manager, owned by, distributed by

Dan Kieffer of PACCAR Inc., speaking for a group of heavy-duty North American truck manufacturers including Volvo and Daimler, said, “Unnecessarily stringent engine standards will only exacerbate today’s trend of delaying new truck purchases,” and consequently keep older, not-as-clean trucks on the road.
product/material produced