What is the central idea of this excerpt?
a) Teachers must put knowledge into their students.
b) People inherently have the capacity to learn.
c) The process of learning is a difficult one.
d) People are inherently unenlightened.

which supporting detail best helps to shape this central idea?
a) "They undoubtedly say this," he replied.
b) "Learn by degrees to endure the sight of being, and of the brightest and best of being, or in other words, of the good."
c) "Professors of education must be wrong when they say that they can put a knowledge into the soul which was not there before."
d) "The eye was unable to turn from darkness to light without the whole body."