解析：What issue does the man mention_考试试题_托业

【单选题】
What issue does the man mentionA．The voucher will take time to process
B．The full value of the item will not be crediteD、
C．The credit is valid for a limited time.
D．The store policy is liable to change.

网考网参考答案：C
网考网解析：
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