Suppose you're the manager of a busy high street clothes shop. You want to find out who your regular customers are. Which of the following methods would be the most effective?
Select one option, then select OK
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Asking customers at the cash desk if they have bought something from the shop before
Getting customers to write their name and address on a slip of paper at the cash desk
Offering each customer a loyalty card that gives regulars a discount
Using the telephone directory to call people living locally to ask if they buy from the shop
OK