Suppose you developed a map with trade routes similar to the map shown. Why did silk traders use land-based trade routes more than sea routes.

Sea routes were too dangerous to use for luxury goods.
Silk cloth was too hard to produce and could not fill up a ship.
The Silk Roads starting point were not along coastal areas.
Silk trader did not trust the sea captains because of pirates.

which is the correct answer

The correct answer is: The Silk Roads starting point were not along coastal areas.