According to the author, Kids' Country is partially caused by ______.

A．The differences between point-source pollution and non-point pollution.
B．How to solve the water pollution problem.
C．The different types of water pollution.
D．The measures government takes to control water pollution.

A．take some legal actions to stop water pollution
B．include the control of non-point pollution in its water pollution control program
C．continue and emphasize the national water pollution control program
D．warn people to pay more attention to water pollution