参考答案：A

解析：
W: Mark, when did you get back from your vacation
M: A couple of days ago. I had planned to stay a little longer, but I ran out of money.
Q: Why did the man return early from his holiday

[听前预测] 选项均为与He有关的完整句子且句中的谓语均使用一般过去式表明，对话与男士过去发生的事情有关。
男士说他几天前就度假回来了，他本打算多呆些日子，但是他的钱花完了，[A]中的didn’t have enough money left是对男士提到的ran out of money的同义转述，故答案为[A]。