'' there's no "too" in the last part of sentence. I’m not sure I follow your reasoning. Answer D is wrong because it would make a comma splice (the joining of two independent clauses with just a comma) and does not contain the conjunction (al)though , which is needed to express the contrast between the two clauses.
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Ti?u C?mIn my opinion, the answer is D because in the sentence that starts with ''although...'' there's no "too" in the last part of sentence.I’m not sure I follow your reasoning. Answer D is wrong because it would make a comma splice (the joining of two independent clauses with just a comma) and does not contain the conjun