Take context from the input text and decide on the accurate relationship between 'Katanga Mining' and 'Glencore' from the options provided.
Options: parent organization, industry, stock exchange, headquarters location

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