Correct answer: A). Law of Dominance
The Mendel's law of dominance states that when a cross is done between the parents that are true for characteristics traits, then under such a situation only one of the trait will be dominant and appear in the next generation, and the other will be hidden. It will appear in the trait that is dominant.
The alleles that are expressed in are called as dominant while the characteristics that do not got express is called a recessive trait.