单选题 The author refers to the illusion of seeing crowds primarily in order to

• (A) illustrate that relativity theory remains a useful tool in determining the topology of the universe
• (B) indicate a descriptive advantage that toruses might have over Euclidean or hyperbolic universes
• (C) argue that empirical methods of determining the shape of the universe are invariably doomed to failure
• (D) suggest that the common sense behind the notion that the universe is simply- connected may be misguided
• (E) assert that two models of the geometry of the universe may vary in terms of observable predictions but be mathematically equivalent