单项选择题

The best translation of this sentence, "Can you answer a question which I want to ask and which is puzzling me?" is__________ A. 我有个问题不懂,想请教您,您能回答吗? B. 你能回答我想问的,一个令我困惑的问题吗? C. 你能回答一个我想问又令我困惑的问题吗? D. 你能回答一个问题吗?这个问题我想问又令我困惑。