Why Do Many Historians and Philosophers Consider the Enlightenment to Be

Why do many historians and philosophers consider the Enlightenment to be the origin of modernity?

A) It represented the first time that philosophy and natural sciences were taken seriously as pursuits of true intellectual value.
B) It was the first time that governments began to take the work of humanistic scholars seriously and apply philosophy to social and political reform.
C) It demonstrated that political and religious leaders could not ignore or simply repress the intellectual and social movements around them.
D) It advanced the secularization of European society and the idea that human reason, rather than theological doctrine, should govern social and political life.