In the pacific ocean, compounds called ferromanganese nodules form around volcanic fragments. these nodules are rich in iron, manganese, copper, nickel, and cobalt. what information would you need in order to evaluate if an attempt should be made to use these as a resource?

| the cost of recovering the materials
|| the environmental impact of recovering the materials
||| the value of the minerals

i, ii, and iii
i and ii only
i and iii only
ii and iii only