Which Statement About Plant Form and Plant Genetics Is True

Which statement about plant form and plant genetics is true?

A) Small genetic differences can lead to large differences in plant form.
B) Small genetic differences lead to only small differences in plant form.
C) Large genetic differences are necessary for large differences in plant forms.
D) Most plant species show little variation in form and little genetic variation.
E) Most plant species show great variation in form,but the genetic reasons are unknown.