Answer: Message travels over channel-A
Explanation: For effective Communication, the following steps must be considered
1.Sender has an idea
2.Sender encodes message
3.Receiver decodes message
4Feedback travels to sender.
Using the appropriate marketing channels which involves transfer of products/services from producer to consumer through functions of Specialization and division of labor, one can achieve that messages pass through appropriate channels
In using non-traditional channels the use of the Internet and mail-order channels, are employed .