Final answer:
Finland taxes some cars more than others primarily to encourage cars that use less gas, promoting environmental sustainability and reducing emissions.
Therefore, option C is correct.
Step-by-step explanation:
The reason Finland taxes some cars more than others is primarily to encourage cars that use less gas. Higher taxes on less fuel-efficient cars are a way to promote environmental responsibility and reduce emissions. This taxation policy is driven by the desire to benefit the environment and to encourage the adoption of cleaner, more sustainable transportation solutions. By making it more costly to own and operate gas-guzzling vehicles, the Finnish government incentivizes consumers to choose cars that are more fuel-efficient, which in turn, can lead to reduced fossil fuel consumption and decreased air pollution.
While some might believe that taxing cars differently could be to benefit Finnish car manufacturers or to keep the roads free from too much traffic, these reasons are not supported by the information provided. Furthermore, the idea that the tax is to discourage people from using public transportation is contradicted by the aim of promoting environmental sustainability, which includes supporting public transit as a greener alternative to personal car use.