Take the following as truth: The combined effect of the program and R&amp;D expenditures, together with other policies described in the CEF report (including a $50 carbon charge applied in the CEF Advanced Scenario), drove a steady reduction in the need for energy compared to the CEF reference case.
Then the following statement: "The $50 carbon tax was the most important factor in this reduction." is true, false, or inconclusive?
Answer: Inconclusive