YD5102-2010《通信线路工程设计规范》6.2.17规定：直埋光（电）缆与直埋光缆采用钢管保护时，与水管、燃气管、输油管交越时的净距可降低为（）

A.0.1M

B.0.15M

C.0.2M

D.0.25M

It was now clear that no such weapons were manufactured and none been found.

A. was found



B. were founded
C. has been found


D. have been founded