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Direction.

Select the most appropriate set of words from the given choices to fill in the blanks.

Scientists, working to save the earth, have ___________ dry water that soaks carbon three times better than water, and hence helps ___________ global warming.

A. aided, cut

B. created, combat

C. built, stop

D. produced, increase

Please do not use chat terms. Example: avoid using "grt" instead of "great".