Each hose used for transferring vapors must（）.

A.have a design burst pressure of at least 25 psig

B.be capable of withstanding at least 2.0 psi vacuum without collapsing or constricting

C.be electrically continuous with a maximum resistance of ten thousand ohms

D.All of the above

发现运行中的钢丝绳直径减少原直径的1%，应进行修复。