The correct answer is B) the powers of the government were separated into three parts.
The reform introduced by Solon was "the powers of the government were separated into three parts."
Solon (638-558 BC) was the famous politician and leader of Athens that established the foundation of what later would be known as "democracy." One of the most notorious things Solon did was to free the slaves in Athens and relieve them of all their debts. He also divided the people of Athens by possessions and established the different classes of society. He also created the concept of Ekklesia, a place where Athenian people could express with liberty.