In a long-term study of a population of a self-pollinated plant, it was observed that an allele, which significantly enhanced vegetative growth and production of flowers in the plant, did not expand in distribution over subsequent generations in the population. This could be because the allele is
(A) dominant lethal in nature.
(B) tightly linked to a gene that allows formation of large number of seeds in each plant.
(C) linked to a gene that suppresses development of axillary branches.
(D) tightly linked to a gene that suppresses development of pollen mother cells in the plant