【单选题】

{{I}}{{B}}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.{{/I}}{{/B}} What has happened since the and of the IceAge

A、Many species have moved further north.
B．Many new species have come into existence.
C．Many species have developed a habit of migration.
D．Many species have become less sensitive to climate.