I believe it is C.) Tasting a solution you think is edible after creating it in the lab.
I could be wrong though.
C is the answer.
Explanation: I had this in my test.
The nitrogen cycle is completed with the process of Denitrification
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Denitrification finishes the nitrogen cycle by transforming nitrate behind to vaporous nitrogen. Denitrifying bacteria are the doers of this method. These bacteria utilize nitrate alternately of oxygen while gaining energy, delivering nitrogen gas into the environment.
Denitrification relies on microbial action to crumble freely nitrogen-containing components. Bacilli absorb nitrate to generate energy, but in the method, denitrification transpires and nitrogen is diminished. Denitrification is an anaerobic means, transpiring chiefly in soils and deposits and anoxic zones in ponds and shores.
I think it's B right because all the fats!
