As a country develops, its economy transitions through different employment sectors according to the Clark-Fisher model. For a supply chain based on electrical materials, which of the following options correctly identifies the activities in the order of primary, secondary, tertiary, and quaternary sectors?
Primary: commercial copper mining; Secondary: copper smelting and wire fabrication; Tertiary: wholesaling and distribution of electrical wiring; Quaternary: research into superconducting materials
Primary: copper smelting and wire fabrication; Secondary: commercial copper mining; Tertiary: wholesaling and distribution of electrical wiring; Quaternary: research into superconducting materials
Primary: commercial copper mining; Secondary: copper smelting and wire fabrication; Tertiary: research into superconducting materials; Quaternary: wholesaling and distribution of electrical wiring
Primary: commercial copper mining; Secondary: research into superconducting materials; Tertiary: wholesaling and distribution of electrical wiring; Quaternary: copper smelting and wire fabrication
