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Which of the following is true according to the ABC Retailer ER diagram? A promotion can be associated with one or many products A promotion

Which of the following is true according to the ABC Retailer ER diagram?
A promotion can be associated with one or many products
A promotion can be associated with many products but it does not have to be associated with any products
Each promotion is associated with exactly one product
A promotion is not associated with any products
All of the above

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