Take the following as truth: The marginal cost of carbon reductions range from $46 to $138/metric ton through 2015 with each scenario showing successively smaller costs as technology characteristics improve and more energy-efficient and/or low carbon technologies penetrate the market.
Then the following statement: "The range of the marginal costs associated with carbon reductions were between $40 to $100 per metric ton in 2015." is true, false, or inconclusive?