The correct answer is B. prevent oxidation
Oxidation is bad for the wine, while sedimentation is regular. Speed of fermentation has nothing to do with oxygen.
For a moderately active adult female, the recommended amount of calories you should consume is around 2,000-2,200. The closest answer from the ones provided would be A. 2,300
Control: all roaches in the other group
Independent: dioxin
Dependent: whether they live or die
Data: the 45/100 dead