Include a statement about the optimal solution chosen, based on research and evidence. Air pollution can be reduced by conserving energy (large amounts of fossil fuels are used to produce energy), going green, using efficient home energy devices, and using clean energy resources. I need evidence that this works so please have a cite with it as well. If you have any questions about the wording. please ask me!

the correct answer is a

we need the questions , i may then you.

answer: any goods being imported from another country may be subject to issued by the federal government are tariffs

explanation:  

tariffs are a tax on anything that are imported from abroad. government use them to protect and boost their local industries and the thought is that they encourage consumers to buy local instead of importing and they will hope will protect jobs and economy in the country that implements them