Athens led a group of city-states following the
a. end of the persian wars.
b. end of the delian league.
c. fall of peloponnesus.
d. fall of sparta

The correct answer is - A. end of the Persian Wars.

After the Persian Wars that lasted very long and cost a lot both in blood and economically, Athens was the city-state that became the leader in the region. Athens at this time was by far the most dominant city-state in Greece in every aspect, mostly economically and military, so it used this advantage to became the dominant force on the peninsula and put itself above the other city-states that were still recovering from the devastating effects of the Persian Wars.

first industrial revolution - the first wave of the industrial revolution lasted from the late 1700s to the mid-1800s. it industrialized the manufacture of textiles and began the move of production from homes to factories. steam power and the cotton gin played an important role in this period.