Wheat supplies have decreased in recent years beca

单项选择题

Questions 9 to 10 are based on the following news. At the end of the news item, you will be given 10 seconds to answer each question.
Now listen to the news.

Wheat supplies have decreased in recent years because ______.

A．wheat prices are very low in the world
B．the demand for wheat is decreasing
C．many regions are affected by drought
D．the wheat consumption is becoming less