The Diamond pipeline describes:

The Diamond pipeline describes:

• A. A schedule for transporting diamonds by air
• B. The process of polishing and sorting diamonds
• C. The system of issuing certificates for cut
• D. The path that diamonds followed from the mine to the consumer

Answer: (D)

The question tests understanding of the end-to-end journey a diamond goes through, from the mine to the consumer. The diamond pipeline describes the entire path a diamond follows: extraction, rough evaluation and sorting, trading, cutting and polishing, certification, and finally distribution to retailers and buyers. This broad view shows how a rough stone becomes a finished diamond delivered to the consumer. The best choice captures this full sequence—the path from mine to consumer. The other options focus on only one aspect: transport by air is just a shipping detail; polishing and sorting cover only a middle stage; certificates for cut refer to certification rather than the whole journey.

The question tests understanding of the end-to-end journey a diamond goes through, from the mine to the consumer. The diamond pipeline describes the entire path a diamond follows: extraction, rough evaluation and sorting, trading, cutting and polishing, certification, and finally distribution to retailers and buyers. This broad view shows how a rough stone becomes a finished diamond delivered to the consumer.

The best choice captures this full sequence—the path from mine to consumer. The other options focus on only one aspect: transport by air is just a shipping detail; polishing and sorting cover only a middle stage; certificates for cut refer to certification rather than the whole journey.