Eusociality

Select one:

a. is when there are several reproductive castes, not just males and females, but for example when there are three kinds of females that all produce their own young in different ways.

b. only occurs in animals that have discrete generations where the mother never sees the grown offspring

c. has arisen in groups that already had a lot of brood-care and often seems to be associated with elaborate nests.

d. is a level of social arrangements only seen in mammals (people, dolphins, etc), not in lower animals.

e. is a second different route to social evolution other than and not involving kin selection