How Was the Rice Genome Modified in Order to Create

How was the rice genome modified in order to create golden rice?

A) One gene from a daffodil was added to the rice genome.
B) Two genes from a soil bacterium were added to the rice genome.
C) No genes were added, but three genes within the rice genome were rearranged to alter the metabolic pathway that normally produces vitamin C.
D) One gene from a daffodil and one gene from a soil bacterium were added to the rice genome.