Which of the following falls under smart shopping strategies?

Utilizing coupons and comparing prices exemplifies a smart shopping strategy because it actively seeks to maximize value and minimize costs. This approach encourages consumers to evaluate options before making purchases, ensuring that they find the best deals available. By using coupons, shoppers can reduce their overall expenditure and often access additional promotions that further enhance savings. Comparing prices across different retailers helps to ensure that consumers do not overspend and that they get the products they desire at the most reasonable prices.

In contrast, maximizing spending on luxury items and buying only full-price items lack this element of financial prudence, as they focus on spending more rather than saving or making informed purchasing decisions. Additionally, buying products online without conducting research can lead to poor purchasing decisions due to a lack of understanding of product quality, price comparisons, or available deals, which can result in overspending or buyer's remorse. Thus, the strategy of using coupons and comparing prices stands out as a fundamental smart shopping practice.