Schwan's Sales Enterprises of Marshall, Minnesota, Markets a Full Line

Schwan's Sales Enterprises of Marshall, Minnesota, markets a full line of frozen foods in 49 states and parts of Canada using door-to-door salespeople who sell from its refrigerated trucks. This particular method of distribution is referred to as a(n)

A) indirect channel.
B) facilitated channel.
C) customer-service channel.
D) direct channel.
E) truck-jobber channel.