问题详情

Whatdoestheunderlinedword“This”(1ine6，para．1)referto？
A．Travellinginthesmokingcompartment．
B．Makingsurethatthetrainwasontime．
C．Buyingtwonewtickets．
D．Thewholesituation．
请帮忙给出正确答案和分析，谢谢！