Trade flourished because these progressing empires were developing new ways to produce products and utilize agriculture in their areas, such as Han with silk and Rome with olives and fishing/seafaring. These empires has never had access to goods that were from other areas before the Silk road, causing trade to become immensely popular and relied upon.
What are you referring to?
I believe A. I am not 100% sure but that is my best guess.
Answer:
Their commander Hannibal marched his troops, including cavalry and African war elephants, across a high pass in the Alps to strike at Rome itself from the north of the Italian peninsula
The Commercial Revolution consisted of the creation of a European economy based on trade, which began in the 11th century and lasted until it was succeeded by the Industrial Revolution in the mid-18th century. Beginning with the Crusades, Europeans rediscovered spices, silks, and other commodities rare in Europe