【单选题】

Questions 11 to 13 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.
There are no black rats inEurope today becauseA．they got plague in the MiddleAges.
B．they live inAmerica,Asia andAfrica now.
C．men killed them all with diseases.
D．brown rats took their place.