民间诗歌常常紧扣时代主题，反映现实生活。下列诗句中，反映中国改革开放成就的有[ ]

A．稻谷堆得圆又圆，社员堆稻上了天

B．阶级斗争记心上，马列主义指航道

C．嫦娥喜送太空客，神女搬迁截大江

D．包干责任春天到，政通人和谱新篇

Cost of quality is the total cost of all efforts to achieve product/service quality, and includes all work to ensure conformance to requirements. All of the following are costs that are incurred EXCEPT （）.

A．cost of poor quality

B．opportunity cost

C．external failure cost

D．appraisal cost