**Question:**How does Volpp et al. (2009)’s study differ from existing work prior to that study's publication?**Options:**1. ○ Their study is the first study that analyzes the effectiveness of financial incentives on smoking cessation.2. ○ Their study is the first study that conducts a randomized control trial to promote smoking cessation.3. ○ They showed that with a large sample size and strong financial incentives, it is possible to improve long-term rates of smoking cessation.**Explanation:**The image presents a multiple-choice question regarding the distinctive aspects of a specific study by Volpp et al. (2009) in comparison to prior research. The options focus on elements like the novelty of analyzing financial incentives, the use of randomized control trials, and the significance of sample size and incentive strength in smoking cessation outcomes.

The study conducted by Volpp et al. in 2009 was a randomized, controlled trial designed to assess…

Answered: How does Volpp et al. (2009)'s study…

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