Questions 15 to 17 are based on the following passage, At the end of the passage, you will be given 15 seconds to answer the questions
Now listen to the passage.
Why didn’t the closest ships come to the Titanic’s rescue

A．Because they didn’t hear Titanic’s desperate calls for help.
B．Because they didn’t want to get involved in the accident.
C．Because they hit each other while rushing to rescue.
D．Because they didn’t have enough fuel.