Explain the reproductive advantage that an angiosperm would have over mosses

Angiosperms have broken the limiting factor of being seedless and can spread their offspring further through the use of seeds.

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.