The biotechnological methods used by two geneticists on a high-yielding rice variety are described below. method x: increased the rice yield by combining genetically similar rice varieties over several years method y: inserted the vitamin a production gene from carrot in the rice which method is likely to be more advantageous? method y because it increases the gene pool method x because it protects the variety from diseases method x because it increases long-term survival of the variety method y because humans who eat the rice can also develop the same gene