The fresco is a dynamic work because, by capturing the energy, humanity, and collective achievement of the Detroit workers, celebrates all working men and women.
By interrupting the sentence with a long aside, the question breaks your concentration and makes it hard to see that although “because” fits the meaning and logic of the sentence, it isn't grammatical.
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The Challenge
By interrupting the sentence with a long aside, the question breaks your concentration and makes it hard to see that although “because” fits the meaning and logic of the sentence, it isn't grammatical.
Answer: B.