Explanation
Correct answer: C.
Choice C is the best answer. “In other words” logically signals that the claim about sensory experience that follows—that sensory experience is the source of knowledge—is a restatement of Aristotle’s theory from earlier in the sentence.
Why the other choices are wrong
Choice A
Choice A is incorrect because “regardless” illogically signals that the claim about sensory experience that follows is true in spite of Aristotle’s theory from earlier in the sentence. Instead, this claim is a restatement of his theory.
Choice B
Choice B is incorrect because “admittedly” illogically signals that the claim about sensory experience that follows is an exception to Aristotle’s theory from earlier in the sentence. Instead, this claim is a restatement of his theory.
Choice D
Choice D is incorrect because “meanwhile” illogically signals that the claim about sensory experience that follows is separate from (while occurring simultaneously with) Aristotle’s theory from earlier in the sentence. Instead, this claim is a restatement of his theory.