What is 'value addition' in the diamond supply chain, and why do some countries focus on cutting and polishing?

What is 'value addition' in the diamond supply chain, and why do some countries focus on cutting and polishing?

• A. Value is added during processing (cutting/polishing) and jewelry assembly; countries with skilled labor and proximity to markets benefit from higher export value and job creation
• B. Value is added only during mining exploration; cutting and polishing has no impact on value
• C. Value is added by shipping diamonds far from markets to reduce costs
• D. Value is added solely through marketing and branding efforts

Answer: (A)