Glencore (GLEN.L) slumped more than 15 percent to a new all-time low after a bearish note from broker Investec that raised doubts over the mining and commodities company's valuation and high debt levels.
Take context from the input text and decide on the accurate relationship between 'Glencore' and 'mining' from the options provided.
Options: owned by, industry, stock exchange, parent organization