The manager of a QFC is concerned that customers may think the store's temperature may be too warm. He surveys every 10th customer after they leave and are getting into their cars whether they are warm enough.

What is wrong with this survey?

The manager of a QFC is concerned that customers may think the store's temperature may be too warm. He surveys every 10th customer after they leave and are getting into their cars whether they are warm enough. 



A: The wrong question
B: The wrong sampling frame
C: A biased sample


Answer: A


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