The IPCC assessment  experts developed 4 storylines ( or projections) to represe

3.   The IPCC assessment  experts developed 4 storylines ( or projections) to represent a group of GHG emission scenarios;  these reflect the uncertainties of the future: population growth,  human consumption of  fossil fuels, and  land use practices. Each scenario envisions a different future path for earth and its citizens. Which statement(s) concerning these models that predict future global average temperatures from 2000 to 2100  is(are)  INCORRECT?
            a. Scenario B1- most aggressive  reduction in emissions bringing 1-3 degree C
                 increase
             b. Scenario A1B- balanced use of fossil and nonfossil fuel use bringing 1.5 - 4.5 degree            
                  C increase
             c.  Scenario A1F1-fossil fuel intensive in emissions bringing 2.5-6.5 degree C
                  increase
             d. these models take into account the possible positive feedbacks  that could further
                  worsen global warming