Charles darwin, an evolutionary theorist, found it difficult to explain altruism. from an evolutionary perspective, it would initially seem that over centuries and generations, altruistic behaviors would because

disappear, altruistic behavior would result in fewer offsprings.

Explanation:

Altruism:

Altruism or altruistic behavior can be explained as a moral practice of selfless behavior of a person for the well being and happiness of others.

According to the Darwin's theory of evolution, the survival of the fittest was hypothesized which comes in contrast to the altruistic behavior.For if we consider both the Natural selection and Altruism:According to Natural Selection, humans or animals should show the behavior that supports their survival, reproduction not concerning the others whereas Altruistic behavior show the selfless concern for others thus lessening one's very own fitness, survival and reproduction.

Ibelieve that the answer is (a).