Explanation
Correct answer: C.
Choice C is the best answer. “Spans” means “extends over a distance of” or “encompasses.” Since we’re talking about the world’s largest plant, it makes sense to say that it “spans” about 200 square kilometers.
Why the other choices are wrong
Choice A
Choice A is incorrect. “Acknowledges” means “recognizes” or “admits the truth of.” Either way, it doesn’t make sense here: a plant can’t “acknowledge” a distance.
Choice B
Choice B is incorrect. “Produces” can mean “makes,” “causes,” or “presents.” But none of those definitions make sense here: a plant can’t make, cause, or present a distance.
Choice D
Choice D is incorrect. This doesn’t fit the logic of the text. “Advances” means “moves forward” or “progresses.” But the plant isn’t necessarily moving forward. Rather, the text suggests that it already covers a distance of 200 square kilometers.