Darwin is known for describing "survival of the fittest" scenario in which an organism is best able to pass its genes one generation to the next

Which of the following scenarios BEST describes survival of the fittest?

How are the reproductive cycles of a fungus and a pteridophyte similar? a)both organisms form fruiting bodies that produce diploid seeds. b)both organisms produce haploid spores and exhibit diploid and haploid stages. c)both organisms reproduce sexually when two haploid hyphae fuse. d)both organisms exhibit a diploid stage and are only able to reproduce asexually.