Explanation
Correct answer: B.
Choice B is the best answer. "Of course" logically signals that the information that follows—about many dances being "defined by order, repetition, and synchronicity"—acknowledges an obvious similarity between these dances and the previous description of the Madison. The sentence then goes on to emphasize a distinguishing feature of the Madison.
Why the other choices are wrong
Choice A
Choice A is incorrect because "however" illogically signals that the information that follows contrasts with the previous description of the Madison. Instead, the information about many dances’ features acknowledges an obvious similarity between these dances and the Madison. The sentence then goes on to emphasize a distinguishing feature of the Madison.
Choice C
Choice C is incorrect because "specifically" illogically signals that the information that follows specifies or elaborates on the previous description of the Madison. Instead, the information about many dances’ features acknowledges an obvious similarity between these dances and the Madison. The sentence then goes on to emphasize a distinguishing feature of the Madison.
Choice D
Choice D is incorrect because "moreover" illogically signals that the information that follows adds to or expands on the previous description of the Madison. Instead, the information about many dances’ features acknowledges an obvious similarity between these dances and the Madison. The sentence then goes on to emphasize a distinguishing feature of the Madison.