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（）；