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105. The waters of this great lake, which is also the world's deepest, have been ____ by waste from a chemical factory.

105. The waters of this great lake, which is also the world's deepest, have been ____ by waste from a chemical factory.

A.cleaned                 B. cleared                 C. dirtied                  D. Thrown

105. The waters of this great lake, which is also the world's deepest, have been ____ by waste from a chemical factory.