Participants in a study of decision making considered two different ways of resolving a dispute with ...

Participants in a study of decision making considered two different ways of resolving a dispute with a neighbor. In one solution, the participant received 600 and the neighbor received 800 . In the other solution, the participant and the neighbor each got 500 . When participants compared the two possible solutions, which option did they prefer?
 
  a. They preferred the option that gave them 600 and the neighbor 800.
  b. They preferred the option that gave the neighbor and themselves 500 each.
  c. There was no difference in the frequency with which the options were chosen.
  d. The majority of participants turned down both options.