11.rbo = new ReallyBigObject（）； 12.//more code here 13.rbo = null； 14./*insert code here*/ Which statement should be placed at line 14 to suggest that the virtual machine expend effort toward recycling the memory used by the objectrbo？（）
- A、System.gc（）；
- B、Runtime.gc（）；
- C、System.freeMemory（）；
- D、Runtime.getRuntime（）.growHeap（）；
- E、Runtime.getRuntime（）.freeMemory（）；
正确答案:A
答案解析:有
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