On the Purchasing-Supplier Satisfaction Model,if the Perceptions of Buyer and Supplier

On the purchasing-supplier satisfaction model,if the perceptions of buyer and supplier fall along the "fairness or stability" diagonal line,this means:

A) one party is satisfied and one party is dissatisfied.
B) one party is better off in the relationship than the other party.
C) both parties are satisfied with the relationship.
D) both parties are at least equally well-off.
E) both parties are unsatisfied with the relationship.