What Is the Difference Between Altruism and Reciprocal Altruism, Respectively

What is the difference between altruism and reciprocal altruism, respectively?

A) Altruism is defined as low-risk behaviour that provides minor benefits to others, while reciprocal altruism involves high-risk behaviour that provides major benefits to others.
B) Altruism is defined as aid given to nonrelatives, while reciprocal altruism involves benefits given to close relatives only.
C) Altruism is defined as the expectation of a future favour in return for present aid, while reciprocal altruism involves close relatives helping each other.
D) Altruism is defined as the sacrifice of an individual's reproductive success to help others, while the reciprocal altruism involves the expectation of a future favour in return for present aid.