While (C) might suggest another similar between The Cruel Herd and Like Moral Vacuum, there is nothing in the passage to suggest that Jackie's taste is similar to that of her peers.
Additionally, the clubs popular with many students at Jackie's university could play many different types of music. Therefore, this answer choice does not necessarily highlight a similarity between The Cruel Herd and Like Moral Vacuum.
Answer choice (A) is correct because it identifies a change which has made The Cruel Herd more similar to Like Moral Vacuum.
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