Ross and colleagues (2004) randomly assigned participants previously identified as either ...

Ross and colleagues (2004) randomly assigned participants previously identified as either competitive or cooperative to one of two games: the Wall Street Game or the Community Game.
 
  They found that two-thirds of the players in the Wall Street Game behaved competitively compared to one-third of people who played the Community Game who behaved competitively. What do these findings suggest?
 
   a. True personality differences do not exist.
   b. It is not important to study individual differences in personality.
   c. Seemingly minor aspects of a social situation can override personality differences.
   d. All the competitive people ended up playing the Wall Street Game.