Imagine a primate species where a female caregiver often helps raise another female's offspring in a way that reduces her fitness by 10% and increases the fitness of the recipient by 25%. According to Hamilton's rule, in which of the following scenarios could this behavior evolve?
A) in groups where all the siblings are full siblings B) in groups where all the siblings are half siblings C) in groups where there are explicit language-based kin terms, such as sister and mother D) in groups where females always leave before reproducing