An argument states: 'The recent surge in our city's recycling rates is a direct result of the new awareness campaign launched last quarter.' Which of the following, if true, would most seriously weaken this argument?
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A
Neighboring cities without an awareness campaign have reported an even greater surge in recycling rates during the same period.
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B
The awareness campaign was primarily featured on social media platforms.
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C
A study published before the campaign showed that most citizens were already aware of the importance of recycling.
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D
The cost of the awareness campaign was significantly higher than the revenue generated from recycled materials.