In Humanism, the Center of Intellectual Life Was

In humanism, the center of intellectual life was

A) the Bible, the writings of Church Fathers such as Augustine, and recent papal encyclicals.
B) the new scientific thought best exemplified by da Vinci.
C) the pursuit of profit in the expanding commercial economy.
D) poetry, history, and rhetoric based on ancient Greek and Roman forms and values.
E) competition between city states and kingdoms in Italy.