One of the most important things to notice about the power of art is the way in which great works continue to exert their influence through the ages. Scientific discoveries which are of major importance at the time when they are made are superseded. Thus, Newton's theory of gravitation has been superseded by Einstein's theory of relativity. Hence the work of great scientists has value in stages on the way to a goal which supersedes them. Broadly speaking, the achievements of generals, politicians, and statesmen have an importance only in their own time. Hence these people and their acts, great as they may have been are like milestones which mankind passes on its way to something else. But with works of art it is not so. The place which they occupy in the estimation of succeeding ages and the power which they exercise over men's spirits are as great as they were in the age which produced them, indeed, their power tends to increase with time, as they came to be better understood.
The statement "Newton's theory of gravitation has been superseded by Einstein's theory of relativity" suggests that

Options

A. a.the theory of relativity has nothing to do with the theory of gravitation.
B. b.the theory of relativity is new in comparison to the theory of gravitation.
C. c.the theory of relativity is an improvement over the theory of gravitation.
D. d.the theory of relativity has suppressed the theory of gravitation.