Utilize the input text as a context reference, choose the right relationship between 'Ram pickup' and 'Chrysler' from the options.
Options: manufacturer, chief executive officer, product/material produced, industry

DETROIT (AP) -- Fiat Chrysler must offer to buy back from customers more than 500,000 Ram pickup trucks in the biggest such action in U.S. history as part of a costly deal with safety regulators to settle legal problems in about two-dozen recalls.
manufacturer