单选题 The research and development section is currently experimenting with two new ______ which should reduce production time without affecting quality.

A、 proceeds
B、 processing
C、 processes
D、 proceedings

【正确答案】 C

【答案解析】横线处应填入被定语从句which should reduce production time without affecting quality(在不影响质量的前提下节约生产时间)修饰的名词。最符合句意的是(C)processes(过程，进程，步骤)。