The figure below shows three generations in one of Mendel's experiments. According to the data in this figure, Mendel's F₂ generation contains many more purple flowers than white flowers. Which of the following is the best explanation of this observation?

A)Three-quarters of the offspring must receive the white allele.
B)The chance of an individual offspring receiving a white allele is only 25 percent.
C)The probability of any individual offspring receiving a copy of the purple allele is 3:1.
D)The white allele is only dominant in about 25 percent of the offspring that inherit it.