Which ancient trading route was known as the 'Royal Road' and featured an early postal system with relay stations approximately every 25-30 kilometers?

Before modern logistics and global shipping, ancient civilizations created elaborate trade networks that connected distant regions and cultures. These ancient supply chains were marvels of innovation, allowing goods like spices, textiles, and precious metals to travel thousands of miles. Test your knowledge about these remarkable early supply chain systems that shaped economic and cultural exchange in the ancient world.

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• The Persian Royal Road (built by Darius I in 500 BCE)
• The Amber Road (connecting Baltic to Mediterranean)
• The Incense Route (Arabian Peninsula to Mediterranean)
• The Tea Horse Road (Southwest China to Tibet)

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