Question #N646

The author of the novel _The Great Gatsby_ was a master of vivid imagery, using language to create memorable pictures in the reader’s mind. For instance, when describing the extravagant parties thrown by Jay Gatsby, Fitzgerald writes, "The orchestra had to play a terrible waltz, each turn a slower and slower circle of people."

Which choice provides the best punctuation for the sentence?
A. slower, and slower
B. slower, and, slower
C. slower and slower
D. slower and, slower