Questions 25 and 26 are based on the following news. At the end of the news item, you will be given 10 seconds to answer the questions. Now, listen to the news.

Why is the world’s largest drug company embroiled in a global controversy

A．Because this company sells drugs of low quality to Nigeria.
B．Because of a medical accident in Nigeria.
C．Because the company treated the Nigerian children with the experimental drug without full understanding.
D．Because the company uses the experimental drug Trovan around the whole world.