Suppose the US Imposes a Ban on Imported Steel from China

Suppose the US imposes a ban on imported steel from China because the Chinese steel was made with factories that pollute the environment. If China complains to the WTO regarding the US ban, the WTO will side with:

A) China, because the pollution in China does not harm the US directly.
B) the US, because a country can determine what goods can and cannot enter its borders.
C) the US, because US factories have to comply with US environmental standards.
D) China, because the WTO is in favor of industries that generate pollution.