Phenotype is physical appearance, so if you have (Bb) or (BB) then you’d have brown eyes because that genotype is dominant.
I would go with C because it’s the only that makes any logical sense. All the others except B are fillers
It means that they are elements on the periodic table
Matter cannot be created or destroyed so it doesn't create matter, but it does gain mass
It is used in measuring the humidity in the air or in gas