What is the just world hypothesis?

What is the just world hypothesis?
 
  a. A hypothesis used to explain why such strong emotions are stirred by sexual assault crimes, even when the victim is unknown to those who feel strongly about the crime
  b. A hypothesis suggesting that people have a strong need to believe the world is fair, so that when a rape occurs, the victim's misfortune is rationalized by attributing responsibility to the victim
  c. A hypothesis used to explain why women, rather than men, are more likely to be sexual assault victims, and that rape is an extension of the repression suffered by women throughout history
  d. A hypothesis that explains why men feel they have the right to overpower or dominate a woman because they subconsciously feel they should have more rights than women