Answer:
The correct answer is letter "A": Undifferentiated products and variable prices in the various channels.
Step-by-step explanation:
In Marketing, distribution channels represent the flow of products from the first line (manufacturer) to the second line (wholesaler). The second line will be later in charge of distributing the products horizontally or vertically to the third, fourth, and final line.
Horizontal channels are those where channel members are at the same level. Their conflicts usually come from dealing with similar products at different prices or the entry of a new line in the market. The first line must always intervene in front of these issues to avoid major risks.