Utilize the input text as a context reference, choose the right relationship between 'Katanga Mining' and 'Glencore' from the options.
Options: stock exchange, headquarters location, industry, parent organization

Glencore said last month it would suspend production at its Katanga Mining (Toronto: KAT.TO - news ) unit for 18 months as it pursues an $880 million modernization project to lower costs.
parent organization