Which of the Following Statements Is Not True

Which of the following statements is not true?

A) After the Peloponnesian Wars, Athens never recovered its position as a powerful city-state.
B) Athens became the cultural center of philosophy.
C) Macedonia assumed the lead in the Greek world as the center of democracy.
D) Macedonia became the powerhouse after the Peloponnesian Wars.
E) Alexander assumed the leadership of Macedonia after the assassination of Philip.