A group of scientists is conducting an investigation to study the conductivity of
perovskite. At which temperature do they need to perform the experiments for
perovskite to conduct electric current?
A. T = 1980°C
B. T > 1980°C
C. T 21980°C
D. T< 1980°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  

yes the answer is total mass in unchanged   : )

im doing test rn im going with 2 but ill give answer if itss wrong,   : )