The correct option is C Are called K-strategists
R-strategist produces offsprings which have a low probability of surviving into adulthood. (e.g., Insects and Spiders)
In K-strategy the species are strong competitors in crowded niches, and invest more heavily in fewer offsprings, each of which has a relatively high probability of surviving into adulthood. (e.g., Elephants and Lions).
Thus, the correct answer is option C.