Pick any one of the following environmental policy proposals and discuss at least two trade-offs or consequences that would have to be evaluated before adopting the measure: (a) A stiff tax on heavy vehicles to encourage the production and use of lighter vehicles that consume less energy and emit less CO2

Pick any one of the following environmental policy proposals and discuss at least two trade-offs or consequences that would have to be evaluated before adopting the measure:
(a) A stiff tax on heavy vehicles to encourage the production and use of lighter vehicles that consume less energy and emit less CO2.
(b) Incentives to encourage the use of advanced electric vehicles in order to improve air quality in polluted urban areas and reduce the use of imported oil for transportation.
(c) A gradually phased-in tax on gasoline that would reduce VMT and thereby reduce auto accidents, pollutant emissions, and energy use, with the tax used to improve the quality of mass transit systems.
(d) Incentives to encourage the production and use of automotive fuels derived from biomass.