If Procter & Gamble, the maker of Dawn dishwashing liquid, wants to know what percentage of customers examine product labels before making a product selection in the grocery store, it can best gain this information through

Question

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Observation would allow Procter & Gamble to directly observe customers in the grocery store and determine if they are examining product labels before making a selection. This method would provide more accurate and reliable information compared to relying on self-reported responses through methods like mail surveys or personal interviews.

If Procter & Gamble, the Maker of Dawn Dishwashing Liquid