Most traders traveled the entire distance of the Silk Road.
Plagues and diseases spread through the Silk Road.
Peoples did not have control over any part of the Silk Road.
Only traders were allowed to use the Silk Road for travel.
The correct answer is Plagues and diseases spread through the Silk Road because on the Silk Road, there was constant contact among people. Obviously, when you are making contact with someone, you share your diseases with them.
