Altruism can be distinguished from reciprocal altruism because altruism is defined as ____ but ...

Altruism can be distinguished from reciprocal altruism because altruism is defined as ____ but
  reciprocal altruism involves ____.
 
  a. the sacrifice of an individual's reproductive success to help others; the expectation of a
  future favor in return for present aid
  b. aid given to nonrelatives; benefits given to close relatives only
  c. the expectation of a future favor in return for present aid; close relatives helping each other
  d. low-risk behavior that provides minor benefits to others; high-risk behavior providing
  major benefits to others
  e. aid given to relatives; benefits given to nonrelatives only

Question 2

The degree of relatedness between a niece and an uncle is _____, and the degree of relatedness
  between first cousins is ______.
 
  a. 0.75; 0.50
  b. 0.50; 0.25
  c. 0.25; 0.125
  d. 0.125; 0.0625
  e. 0.0625; 0.03125