B. Which of the possible products is the precipitate, and how do you know?

the answer to your question is c

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  

it should have an internal chamber and two thermometers sticking out of the top. the internal chamber will also be closed off from the outside.