Questions 14 to 17 are based on the following passage. At the end of the passage, you will be given 20 seconds to answer the questions.
Now listen to the passage. Which of the following statements is NOT true about life 150 years ago
A．Travelling long distances were easier than before. B．Messages could be sent quickly. C．Crossing the ocean could be done safely. D．The fear of wild animals became a big barrier of communication.