Questions 11 ～ 13 are based on the following talk. You now have 15 seconds to read Questions 11 ～ 13. Which of the following is true according to the talk

A．There has been a slower population growth in the past ten years.
B．The world’s birth rate is higher than ten years ago.
C．Families are as large as before.
D．Birth control has been carried out well all over the world.