Is Haplodiploidy a Necessary Condition for the Evolution of Eusociality

Multiple Choice

Is haplodiploidy a necessary condition for the evolution of eusociality?

A) Yes, true eusociality is found only in the hymenoptera.
B) Yes, eusociality can only evolve when indirect fitness is as high as occurs between haplodiploid sisters.
C) No, true eusociality is also found in organisms that do not have a haplodiploid genetic system.
D) No, coefficients of relatedness between sisters are never 0.75 because there are always multiple fathers.