When Cultivars Require Adaptations Not Currently in Their Genetics,plant Breeders

When cultivars require adaptations not currently in their genetics,plant breeders

A) may treat the seeds with chemicals that cause mutations,to try to generate new forms.
B) often introduce traits found in wild varieties of the plant.
C) may try to introduce genetic traits found in pests of the crops.
D) use fertilizers to change the chemistry of the crops.