The product team and the design team at R.Q.M Manufacturing are reviewing product quality issues. The members of the two teams enter into an argument about which strategy to use to address these issues. In an attempt to resolve the conflict between the two teams, the group leader first questions the two teams to determine their interests and needs. He then urges them to work together to find a mutually beneficial solution that will satisfy all their needs, leaving no one unsatisfied. Which of the following styles of conflict resolution has the group leader used in this scenario? 

a. The accommodate style 

b. The oblige style 

c. The compete style 

d. The collaborate style