Besides the city of Rome, what were two cities in the Roman Empire where trade by sea likely occurred?

Goods were not only exchanged across the Roman world, however, as bustling ports such as Gades, Ostia, Puteoli, Alexandria, and Antioch also imported goods from such far-flung places as Arabia, India, Southeast Asia, and China.

Explanation:

some american cities felt workers were being oppressed by business monopolies

increases in demand are shown by a shift to the right in the demand curve. this could be caused by a number of factors, including a rise in income, a rise in the price of a substitute or a fall in the price of a complement.

which the answer is:

b