Explanation
Creating a filter: when we read the original sentence, we
should examine the pronoun "it." The reference is clear: "it" refers to the
first three words of the sentence, "the term `sustainable.'" But that means the
sentence isn't saying what it's trying to say. It's saying, "The term `sustainable'
is a substance" that does some things. But the term "sustainable" isn't a
substance; it's a term, a word. We need something more like, "The term
`sustainable' means a substance," or, better, it refers to a substance that is
recycled. We'll look for that.
Applying the filter: Looking for that in the answer
choices, we find (D), which uses a different verb but is otherwise exactly what
we were looking for. Choice (E) is a little awkward and is missing the words
"that is," distorting the meaning of the end of the sentence. The correct
answer is (D).
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