15. According to Hamilton's rule, the natural selection favors altruism when rB>C, where ris coefficient of relatedness (fraction of genes shared), B is benefit, the average number of extra
offspring that the recipient of an altruistic act produces, and C is cost, how many fewer offspring
the altruist produces. Let's say that members of species X produce 4 offspring on average.
Individual A of species X is in a perilous situation that will result in its death if the individual A
does not get help. First cousin of individual A decides to risk its own life in order to save
Individual A. what would be maximum risk of death for the cousin, in order for altruistic act to
be favored by natural selection?
A) 6 2596
B) 12.5%
C) 25%
D)50.​