Charles Darwin,an Evolutionary Theorist,found It Difficult to Explain Altruism

Charles Darwin,an evolutionary theorist,found it difficult to explain altruism.From an evolutionary perspective,it would seem that over centuries and generations,altruistic behaviours would _______ because _______.

A) disappear; self-sacrifice would produce fewer offspring.
B) increase; more unfit offspring would survive.
C) remain unchanged; the gene pool would become more variable.
D) disappear; altruistic partners would not be desirable as mates.
E) increase; of the impact of culture.