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问题：
[单选题]下面对于喷锚支护设计原则,叙述不正确的是:( )
A、对于整体围岩,一般不支护,对于大跨度洞室或高边墙洞室,需要喷锚支护。
B、对于块状围岩,一般喷射混凝土即可,有时也配以锚杆。
C、对于层状围岩,主要为锚杆。
D、对于软弱岩石,喷射混凝土即可。
参考答案：
D
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