In the year 1960s, suburbanites start to landscape by employing bark which had formerly been discarded whenever Clear-Cut Forestry Products turned logs to lumber whereas decimating old-growth forests. The extra operating revenue to Clear-Cut from selling bags of bark most directly outcome from: (1) Specialization according to the comparative advantage. (2) Economies of scope. (3) More extensive divisions of the labor. (4) Economies of the scale. (5) Efficiency profits from decreased transaction costs.
Can someone please help me in finding out the accurate answer from the above options.