Which of the following statements best describes t

单项选择题

Questions 29 and 30 are based on the following news. At the end of the news item, you will be given 10 seconds to answer the questions.
Now, listen to the news.

Which of the following statements best describes the situation of the second bomb

A．The bomb attacked a subway with over twenty people killed.
B．Broken pieces of a tunnel wall were thrown.
C．The roof of a bus was blown down.
D．The bomb attacked a train in the financial district.