You Find a Plant near the Edge of a Forest

You find a plant near the edge of a forest that seems to be related to a wild species of nut tree that produces edible fruit.This new tree has larger nuts and a more compact stature, which would make it ideal for cultivation and harvesting in an orchard.If the new tree is a mutant of a known species, these _______observed differences in the two nut trees could be due to _______ genetic factors.

A) minor; large
B) pronounced; large
C) minor; small
D) pronounced; small
E) recent; old