What Is a Benefit of Having Strong Relations with a Vendor

What is a benefit of having strong relations with a vendor?

A) A retailer could receive popular merchandise in short supply.
B) It is easier to return to a solid relationship with a vendor when private-labels fail.
C) Strong relations mean better profits for shareholders.
D) Vendors supply complementary merchandise to their most profitable supporters.
E) Vendors determine which retailers will receive the better prices.