Answer: B: it is more efficient and economical to grow this variety
Step-by-step explanation:
The genetic engineering is the process of manipulation of the genome of the organism in order to remove diseases and disorders, introduction of traits which can improve the quality of the organism.
According to the given situation, if the corn species is genetically modified such that it can possess it's own pesticide. This will reduce the cost of using pesticides in the field also the crops will remain disease free, healthy and useful for consumption. Therefore, B: it is more efficient and economical to grow this variety is the correct option.