Answer:
The correct answer is the option C: Clarification and justification.
Step-by-step explanation:
To begin with, in the stage of clarification and justification of the negotiation process the parties do not need to be argumentative but instead they need to be educative to each other by showing the other what are the reasonable statements that are established in order to proove their positions on each argument done before. That is why, in this stage the positions of each party are discussed at length in order to comprehend what every party is supporting for and that is why this stage is called of ''justification''.