Burnstein and Colleagues Reason That Helping Should Decrease as the Genetic

Burnstein and colleagues reason that helping should decrease as the genetic relatedness between helped and recipient decreases and argue that __________.

A) helping that is relatively trivial is a better test of the inclusive fitness hypothesis
B) inclusive fitness theory is the best of competing hypotheses for differences in helping behavior as a function of genetic relatedness
C) no other theory besides inclusive fitness hypothesis predicts a helping gradient that follows from the amount of genetic overlap
D) many theories in psychology predict a helping gradient that follows from the amount of genetic overlap