Concept:An aircraft is a high-value industrial good, so the producer sells it directly to the buyer.
Explanation:An aircraft is not an ordinary consumer product like clothes, shoes, or groceries.
It is bulky, very expensive, and often custom-built for a specific airline.
Selling through wholesalers or retailers is not practical for such a product.
The most suitable channel is the direct channel, where the manufacturer deals directly with the consumer.
This removes all middlemen and reduces distribution costs.
It also allows the manufacturer to offer technical support, expert advice, and after-sale services.
Hence, the aircraft is sold through the manufacturer-to-consumer channel.
Answer:D. manufacturer - consumer