Dredgers, Inc., is the major wholesale distributor of heavy equipment in the state of Georgia. Its closest competitor is Excavators Company, another Georgia firm. The two firms agree that Excavators will operate in southern Georgia and Dredgers will operate in northern Georgia. This is ____.

(A) a group boycott.

(B) a market division.

(C) a price-fixing agreement.
(D) a tying arrangement.