单项选择题
Customers can obtain a cheaper meal by __________
A．bringing the advertisement with them
B．making a phone call to the restaurant
C．providing proof of their enjoyment
D．contributing to the cost of advertising
A．bringing the advertisement with themB．making a phone ……
Customers can obtain a cheaper meal by __________
A．bringing the advertisement with them
B．making a phone call to the restaurant
C．providing proof of their enjoyment
D．contributing to the cost of advertising
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