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

对于具有民族特色的传统民居，正确的方法是（　　）

A．全部拆除再照原样重建

B．拆除后建设现代化的高楼大厦

C．应该大力保护

D．不要乱动，任其发展