A great disadvantage of introduction as a method of crop improvement is the?

A. adaptation of introduced crop to a new area of cultivation
B. usefulness of an introduced crop as basis for a breeding programme
C. incorporation of the desirable characteristics of the introduced crop into the local corp
D. introduction of a new type of disease into a new area of cultivation
E. integration of the introduced variety into the agricultural production of a new area

Correct Answer:

Option D – introduction of a new type of disease into a new area of cultivation