【单选题】Consumers deprived of the information and advice they needed were quite simply ______ very cheat in the marketplace.
A．at the mercy of
B．in lieu of
C．by courtesy of
D．for the price of
【单选题】Consumers deprived of the information and advice they needed were quite simply ______ very cheat in the marketplace.
A．at the mercy of
B．in lieu of
C．by courtesy of
D．for the price of
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