Read the following passage from a body paragraph in an explanatory essay:

Chaucer used traditional, well-known stories to make the point that fortune is fickle. His viewpoints on success, fame, and good fortune depict a negative framework of experience and thought.
Which statement provides the most accurate evaluation of the passage?
A. The passage contains no evidence.
B. The style is informal and inconsistent.
C. The claim is unclear.
D. The evidence is irrelevant.