GMAT Critical Reasoning (CR) | Garbage Disposal CR

The plastics commonly used in household garbage bags take, on average, 100 years to decompose in landfills. From an environmental
standpoint, the plastic bag industry should be forced to switch to newly developed plastics, which begin to decompose after only 20 years.
Which of the following pieces of information would be most helpful in evaluating the argument above?

(A)the rate of growth or decline in sales of plastic garbage bags
(B) the number of plastic garbage bags sold last year that eventually
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