Step 1: Understand the topic:
The question is from the chapter on the making of a global world. Its first section tells how trade and cultural contacts linked distant parts of the world in early times.
The silk routes are the best known case. We must decide if each of the two given lines about them is true.
Step 2: Test Statement I with facts:
Trade routes under this name joined China to Central Asia, Persia and Europe. Goods, such as silk, spices and pottery, moved along them. Religious ideas like Buddhism and Christianity moved too.
This shows commercial and cultural ties between far flung places before the modern period. So Statement I is true.
Step 3: Test Statement II with facts:
The routes were called 'silk routes' because silk from China was a major item on them. The word 'silk' in the name tells us how valuable these cargoes were in the west.
So Statement II is true.
Step 4: Match with the options:
Since both are true, only option C fits. The other options each call at least one true statement incorrect.
Final Answer:
Both statements are correct. Option C is the answer.
\[\boxed{\text{Option C}}\]