Explanation
Correct answer: D.
Choice D is the best answer. This best states the function of the underlined sentence. The sentence basically says: “He stood out, so I looked more closely at him.” Then the rest of the text describes him in detail.
Why the other choices are wrong
Choice A
Choice A is incorrect. This doesn’t state the function of the underlined sentence. The previous sentence basically says: “He was still standing in the middle of the cottage”—it doesn’t include any description of the character himself.
Choice B
Choice B is incorrect. This doesn’t state the function of the underlined sentence. The following sentences describe the character, not the setting.
Choice C
Choice C is incorrect. This doesn’t state the function of the underlined sentence. The underlined sentence basically says: “He stood out, so I looked more closely at him.” The previous sentence basically says: “He was still standing in the middle of the cottage.” There’s no contrast between these two sentences.