As Countries Such as Taiwan, South Korea, and Japan Have

As countries such as Taiwan, South Korea, and Japan have industrialized, what strategy have they used to address their air pollution problems?

A) They've stopped engaging in pollution-generating activities altogether.
B) They've moved their pollution generating activities to countries that have less stringent environmental standards.
C) They've moved these activities to less visible areas within their countries.
D) They've installed state-of-the-art pollution control devices in all their factories.
E) They've ignored these problems.