10. People traveling along the Silk Road traveled by ....
caravans
planes.
trains.
automobiles.
![10 People traveling along the Silk Road traveled by caravans planes trains automobiles class=](https://us-static.z-dn.net/files/df9/69eff7d89c53898bf21c25fe8ce0c91a.png)
Answer:
caravans
Explanation:
plans weren't invited by then
trains weren't invited by then
automobiles weren't invited by then
caravans go way back to the Oregon Trail and etc.