Respuesta :
The answer is D, they were working o superordinate goals.
Explanation: Superordinate goals are the kind that gets people to work together form different groups that might dislike each other. This type of goals requires cooperation from both groups because the goal they are trying to achieve is and should always be superior to their conflict.
This is a powerful tool to put an end to conflicts between groups, to break barriers, and help to defeat differences between the groups. It is exactly what happens in the case of study provided, two different cheerleading groups that dislike one another but have to work together to reach a common goal.