单选题：A new system of quality control was brought in to overcome

题目内容：

A new system of quality control was brought in to overcome the defects in the firm’s products.
A) invested
B) introduced
C) installed
D) insisted

参考答案：

答案解析：

证券持有者对公司的财产有直接支配处理权的证券是（　）。A、证权证券B、物权证券C、债权证券D、要式证券

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