I would go with mathmatical formula because of physics and what not but I'm not completely sure so if you have a different possible answer you think would be better, go with that :)
A because it explains the differences
Answer:
yes he did ,
In 1873, Joseph Lister isolated the first bacterial pure culture which he called Bacterium lactis. This lactic acid bacterium is now called Lactococcus lactis and is used for fermenting milk to produce hundreds of different dairy products.
the step in step 2 is wrong
