Please submit your concern

Explanation:

Option 1 is incorrect as the author states that the direct model was not at all being exploited by any of their competitors.
Option 2 is incorrect as the analysis points out that the warehouse sends the product to the dealer.
Option 3 is incorrect as the author states that the norm of the industry is to push the production of the factory to the customers. It does not depend upon the customer feedback.
Option 4 is correct whenever the production exceeds the demand, manufacturers but down the prices to push sales.
Hence, the correct answer is option 4.