While snorkeling a local watering hole, you observe that two different snail species commonly feed on the shoreline grasses. After a bit of research, you learn that both species reproduce once annually. One species, whose shell spirals to the left, produces 12 offspring per adult, with 8 of those making it to reproductive maturity. The other species, whose shell spirals to the right, produces 10 offspring per year, and all are successful at reproducing a year later. Which species has the greater annual fitness?
a. The right-spiralling species
b. The left-spiralling species
c. Both have the same fitness