在可行性研究中，主要根据（）的结果，以及有关的产业政策等论证项目投资建设的必要性。

A．投资方案和融资分析

B．工艺路线和设备选择

C．市场调查及预测

D．财务和经济评价

The primary driver behind the demand for continual quality improvement is ______ .

A．an increase in the number of the projects being worked

B．widespread public interest in government cost improvement reports

C．the prevalence of media reports on quality circles and other quality improvement

D．the need to reduce the cost and ensure the performance of products