Asubstance that influences the reaction but does not participate in the reaction is a

what have scientists found to be the most efficient and effective way to insert new sequences into an individual? a-scientists have created genetically altered foods that release dna during digestion. b-scientists use viruses to insert specific gene sequences. c-scientists irradiate genes so that they can be absorbed through the skin.

i wish i could with all of them i can barley see the first one so here's the answer to the first one b