题目:Abstain from buying those products which are available in the market in excessive packaging because_______?
A. this act will courage the manufacturers to use excessive packing material, you can save a lot of carbondioxide from entering the atmosphere
B. this act prevent the manufacturers to use excessive packing material, and you can save a lot of carbondioxide from entering the atmosphere
C. this act will discourage the manufacturers to use excessive packing material
D. All above.
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