Small as it is, the ant is ______ any other animal on the earth. [      ]

A. much as a creature as    

B. as much a creature as

C. a creature as much as    

D. as much as a creature

当电力系统发生故障时，要求继电保护动作，将靠近故障设备的断路器跳开，以缩小停电范围，这就是继电保护的什么特性？