Question: The manager at the local Ruby Tuesday's restaurant wanted to investigate the effect of music on the average revenue per customer. Each night for

The manager at the local Ruby Tuesday's restaurant wanted to investigate the

The manager at the local Ruby Tuesday's restaurant wanted to investigate the effect of music on the average revenue per customer. Each night for one month, fast- paced music was played. The following month, slow-paced music was played every night. The average revenue per customer for each month was compared. This method of gathering data is known as O A. surveys O B. experiments OC. focus groups O D. direct observation

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