Which of the following sentences indicates a subjunctive mood？A．Not until nine o"clock yes

Which of the following sentences indicates a subjunctive mood？

A．Not until nine o"clock yesterday evening did we finish the work.

B．I had been at the bus stop for 20 minutes when the bus finally came.

C．Without your timely arrival, she would have been drowned.

D．If my mother has time, she will take me to the museum.

请帮忙给出正确答案和分析，谢谢！