Helping behavior appears on the surface to be at odds with evolution: helping someone else, such as ...

Helping behavior appears on the surface to be at odds with evolution: helping someone else, such as giving food, might endanger one's own survival. Which of the following statements best clarifies this issue?
 
  A) Helping another person only makes sense if an individual knows that the other person will help you in the future, thus increasing the likelihood of mutual survival.
  B) Helping behavior is influenced by cultural factors like socialization but not by genetic factors.
  C) The actions of an individual are not so much designed to ensure that the individual will survive as to ensure that the genes of that individual will survive.
  D) Helping the opposite sex makes sense if it enhances the chances of mating.