The layoffs come as the company is implementing a roughly 50 per cent drop in mining, stacking and crushing rates at the mine, in which Freeport owns a 51 per cent stake and Chilean state-owned copper giant Codelco has the remaining 49 per cent interest.
Take context from the input text and decide on the accurate relationship between 'Codelco' and 'copper' from the options provided.
Options: member of, publisher, product/material produced, position held