II. Large numbers of potential customers
III. Customers who each represent a small percentage of potential sales
(A) I only
(B) II only
(C) I and II only
(D) I， II， and III
II. Large numbers of potential customers
III. Customers who each represent a small percentage of potential sales
(A) I only
(B) II only
(C) I and II only
(D) I， II， and III
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