Answer:
D. a vibrant commercial shipping trade with Mesopotamia.
Step-by-step explanation:
The Harappa and Mohenjo-Daro civilizations practiced intense trade with Mesopotamia, Southern India, Afghanistan, and Persia. Gold, silver, copper and turquoise was traded, there were many routes and trading outposts. Carts and boats were used as vehicles of trading and transportation. A developed agriculture fed the population and also provided stock for trade.