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单选题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 object rbo?()ASy

题目
单选题
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 object rbo?()
A

 System.gc();

B

 Runtime.gc();

C

 System.freeMemory();

D

 Runtime.getRuntime().growHeap();

E

 Runtime.getRuntime().freeMemory();

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