Mark the letter A, B, C, or D on your answer sheet to indicate the cor

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.    

Planting trees can contribute to reducing global warming.

• A. A. Global warming can't be controlled by planting trees.
• B. B. Planting trees is the only way to control global warming.
• C. C. Planting trees can accelerate global warming.
• D. D. Planting trees can help reduce global warming.

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