Genetically modified "golden rice" has been engineered to meet human nutritional requirements. Which one of the following statements best qualifies golden rice?

• A. The grains have been fortified with genes to provide three times higher grain yield per acre than other high yielding varieties
• B. Its grains contain pro-vitamin A which upon ingestion is converted to vitamin A in the human body
• C. Its modified -genes cause the synthesis of all the nine essential amino acids
• D. Its modified genes cause the fortification of its grains with vitamin D.