Answer:
The correct answer will be environmental impact and likelihood of cross-pollination.
Explanation:
The prime concern at the time of the implementation of genetically modified foods is their influence on the environment. The tendency to supply in large quantities or external consistency will not be a major worry for the introduction of genetically modified foods.
However, if the presented genetically modified foods possess the tendency to cross-pollinate with other crops then it can result in unintentional gene transfer and can harm the entire environment including the health of human beings. Apart from this the cost of production would also be not a prime worry for the introduction of genetically modified foods as large scale production or progression in new technology can minimize the overall cost of production.