The Fundamental Determinant of Whether a Firm Is a Member

The fundamental determinant of whether a firm is a member of a marketing channel is:

A) If the firm performs distribution tasks.
B) If the firm is considered to be important to the channel manager.
C) If the firm performs negotiatory functions.
D) If the firm performs tasks that are necessary to make products or services available to ultimate buyers.
E) If the firm performs ancillary tasks.