Silene Is a Genus of Plants in the Caryophyllaceae

Silene is a genus of plants in the Caryophyllaceae.Many species of this plant have separate male and female individuals.Two species meet at a hybrid zone.What change would most likely cause the hybrid zone to become wider?

A) The fitness of the hybrids increases.
B) The fitness of the hybrids decreases.
C) The dispersal rate decreases.
D) The hybrid plants become shorter, but maintain the same fitness.
E) The hybrid plants become taller, but maintain the same fitness.