Analyze the relationship between 'Starbucks' and 'coffee' within the context of the input sentence.
Options: chairperson, product/material produced, subsidiary, distributed by

But when coffee prices drop unexpectedly, as they did this year, these advance strategies can have some negative short-term consequences: It's likely that Starbucks paid more than the current spot market price for coffee stocks, which would be reflected in future financial statements.
product/material produced