During the commercial revolution where did trading centers most often develop

Along Bays // Waterways for easy trading // purchasing with other countries. I hope this helps you. :)

During the Commercial Revolution trading centers most often developed along waterways. For example, the Italian city-states were on the Mediterranean Sea.

Explanation:

i’m   sure probably just geuss and see which one you can get right, i’m pretty sure it is the combination of goods and services

its d i know cause i've been googling it