A turtle shell appears external to the animal, protecting its body like armor. _______ the shell is often incorrectly assumed to be an exoskeleton, a rigid outer casing like that of a crustacean or an insect, when in fact it is an endoskeleton, a part of the turtle’s internal bone structure, more akin to a spine or a pair of ribs. Which choice completes the text with the most logical transition?
","rationale_html":"Choice D is the best answer. “Hence” logically signals that the information in this sentence about turtle shells—that people incorrectly assume they are exoskeletons—is a consequence of the shells appearing external to the animal. Choice A is incorrect because “that being said” illogically signals that this sentence qualifies or contrasts with the previous information about turtle shells appearing external to the animal. Instead, it presents a consequence of that information. Choice B is incorrect because “however” illogically signals that this sentence contrasts with the previous information about turtle shells appearing external to the animal. Instead, it presents a consequence of that information. Choice C is incorrect because “for instance” illogically signals that this sentence provides an example supporting the previous information about turtle shells appearing external to the animal. Instead, it presents a consequence of that information.
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","ord":0},{"label":"B","content_html":"However,
","ord":1},{"label":"C","content_html":"For instance,
","ord":2},{"label":"D","content_html":"Hence,
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