. In snapdragons, the allele for red flower color (R) is incompletely dominant to the allele for white flower color (W). Snapdragons that are heterozygous for flower color have a pink phenotype. Which of the following crosses could show all three flower color phenotypes (red, white, pink) among the offspring?

RR x WW
RR x RW
RW x RW
RW x WW