GRE General Test: TC-263323 GRE Text Completion

Among the factors that (i)_____the competitiveness of integrated producers are excessive labor, energy, and capital costs, as well as manufacturing (ii)_____: their equipment is old and less automated, and does not (iii)_____many of the latest refinement in steelmaking technology.
Blank (i)
Blank (ii)
Blank (iii)