Answer:
b). Athens
Explanation:
Athens proved to be the most dominant and most important economic power in Greece in the late sixth century BC. Athens power and wealth was later supported when silver was discovered in the neighboring mountains. Athens was considered as an efficient trading center with other Greek city states.
However later there was an increase in populations of the city states and due to the unavailability of resources , many Greeks began to look outward and started colonizing outside of mainland Greece. This created tension conflict between Greece and the Persian empires, that led to long and fierceful battle between the two for two long decades. However, Athens particularly was a vocal supporter of the rebellion against Persia.
