Consumer market power is named as the Consumer sovereignty.
Option - C
Explanation:
Consumer welfare sovereignty creates the impression that the customer is the ultimate judge of his or her own social security and his needs and wants (leaders). It is used to argue that, for e.g., the government should help the needy by providing them with money transfers, instead of offering them goods that are considered "crucial" by political leaders.
The customer becomes independent because, he has not assigned to any democratic institutions to use the control that he can wield collectively by his power to negotiate.