单项选择题

In this section, you will hear several passages. Listen to the passages carefully and then answer the questions that follow.
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.
Where does most knowledge of Asian elephants come from

A. From the captured or tamed elephants.
B. From the British wildlife protection group.
C. From elephant hunters in Thailand and Burma.
D. From tourists visiting the Thai-Burmese border.