Refer to the input text as context and select the correct relationship between 'Costco' and 'retail' from the available options.
Options: creator, currency, subsidiary, industry

By comparing these numbers against competitors’ numbers as well as against the retail sector (Wal-Mart, Target, Costco Wholesale Corp ( COST ), and Dollar General Corporation ( DG ) are large players in the sector), we can figure out how efficient the business is.
industry