Athens held the advantage during the Peloponnesian War.
B. Laws can change social prejudice
The correct answer is the United Provinces of the Netherlands (Holland). They founded the first Settlement of what would become the city of New York in 1625. In 1664 the colony was captured by the British Empire. The city was incorporated officially into the British possessions in North America in 1665.
Before Spanish colonization, Mexico has established its own class structure among the population. However, after colonization, the class structure changed drastically. The Spanish elites imposed a caste system with different levels of biological mixtures between different ethnic groups living in Mexico which decided one's status in society. Those who were biologically more Spanish enjoy a better standard of life than those from Indigenous or African lineage. The strict hierarchy caused discontent among the people which led to civil unrest and an inevitable revolution.