Question 26 is based on the following news. At the end of the news item, you will be given 5 seconds to answer the question.
Now listen to the news.

A．to spread chemicals over the forest near Moscow airport
B．to spread chemicals over the planes to clear the fog around them
C．to spread chemicals over the fog to help create "windows" in the fog for planes to land and take off
D．to spread chemicals over the runway at Moscow airport