Silk routes are a good example of vibrant pre-modern trade and cultural links between distant parts of the world. Which one among the following is not true of silk routes?

Options

A. Historians have identified several silk routes over land and by sea
B. Silk routes have linked Asia with Europe and Northern Africa
C. Silk routes existed before the Christian era and thrived almost up to the fifteenth century
D. As a result of silk route trade, precious metals like gold and silver, flowed from Asia to Europe