John, George, Paul, and Richard Are Air Traffic Controllers

John, George, Paul, and Richard are air traffic controllers. They encounter a stressful, anxious situation in which two planes might soon collide. Which of the following conditions would most encourage this group to display groupthink when pondering their next step?

A) A majority decision is more acceptable than a unanimous decision.
B) There are systematic procedures in place to handle such situations.
C) None of them is considered to be a supervisor of any of the others.
D) They are a highly cohesive group.