The best method for Lance to gather data on the quality of products made at his factory would be A. Observation.
Observation allows Lance to directly assess the quality of the products as they are being made or handled in the factory, providing him with objective, real-time insights into the production process and product quality. This method can help him identify any issues in manufacturing or quality control without relying on subjective reports or feedback from others.
Surveys, interviews, and focus groups are useful for gathering perceptions and opinions, but they may not capture the actual quality as effectively as direct observation in a manufacturing setting.
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