Questions 11 to 14 are based on the following passage. At the end of the passage, you will be given 20 seconds to answer the questions.
Now, listen to the passage.
Which state provides family with tax credits to pay for private schools

A．There was no garbage left to clean up.
B．There was more garbage than before and they had to work harder.
C．The river had become so clean that a lot of water birds came back.
D．The river was much cleaner and they had to search for garbage.

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.