The best candidate for mass marketing among the options provided is a national craft supply store.
Here's the reasoning behind this choice:
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Local businesses (like a local doctor's office or smoothie store) typically focus on community engagement and target a more specific, localized audience. Their marketing strategies are often tailored to their immediate customer base and may not benefit as much from mass marketing.
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A national ice hockey equipment store targets a more niche market focused on hockey enthusiasts. While it can certainly engage in wider marketing efforts, the audience is still limited to those interested in ice hockey, making it less suited for broad mass marketing.
In contrast, a national craft supply store can appeal to a wide range of consumers interested in various crafts and DIY projects. The broad demographic interest in crafting—from hobbyists to professionals—makes mass marketing more effective in this case.