The Silk road is a rode between ancient Rome and ancient China. Any road that traders took from and to these two places was called the silk road. If you need help writing a paper, here is a college essay on the silk road. This should help: https://www.learner.org/courses/worldhistory/support/reading_9_3.pdf
 
        
        
        
Your answer would be A. Hope this helps!
        
             
        
        
        
Answer:c) prolonged events similar to the sympathetic nervous system, such as elevated heart rate and blood pressure, decreased digestive and urinary activities and increased metabolic rate. 
Explanation:A pheochromocytoma which is spelt (fee-o-kroe-moe-sy-TOE-muh) is a rare tumor which is commonl noncancerous which affect areas that control heart rate metabolism and blood pressure.
Pheochromocytoma produce hormones which elevate blood pressure,cause headache and sometimes panic attack symptoms.
Symptoms
High blood pressure
Headache
Heavy sweating
Rapid heartbeat
Tremors
Paleness in the face
Shortness of breath
Panic attack-type symptoms
 
        
                    
             
        
        
        
Answer:
They were all on a river, for trade, transportation, and drinking water.
Explanation: