Take context from the input text and decide on the accurate relationship between 'THORNTONS' and 'chocolate' from the options provided.
Options: product/material produced, employer, owner of, member of

THORNTONS - An offer by Nutella spread maker Ferrero to buy out investors in British chocolate retailer Thorntons has reached a take-up of nearly 75 percent, the head of the Italian confectionery group was Quote: d as saying.
product/material produced