Which of the following statements is TRUE for both callable and putable bonds()

A. The value of the bond is equal to the value of a similar straight bond plus the value of the option.

B. When yield volatility increases, the value of the option increases.

C. The options both benefit the bond issuer.

电缆着火或电缆终端爆炸的处理：

a）立即切断电源；

b）用干式灭火器进行灭火；

c）（）电缆故障，应立即起动事故排风扇；

d）进入发生事故的电缆层（室）应（）空气呼吸器。

A.室内；使用

B.室外；使用

C.室内；停用