Answer:
The correct answer is option A- "Tampering with nature by mixing genes among species".
Step-by-step explanation:
The advent of genetically engineered crops had bring several benefits including crops with resistance to adverse environment conditions and diseases. However, there are ethical considerations that should be taken into consideration before genetically engineered crops are released to the market. One of the considerations is the risk of tampering with nature by mixing genes among species. Crops transfer their genes constantly in nature, therefore is important to have the genetically engineering crops in confinement to avoid that genes could be mixed among species in nature.