單項選擇題

1. public class X ( 
2. public object m ()  { 
3. object o = new float (3.14F); 
4. object [] oa = new object [1]; 
5. oa[0]= o; 
6. o = null; 
7. return oa[0]; 
8. } 
9. }  
When is the float object created in line 3, eligible for garbage collection?()  

A. Just after line 5
B. Just after line 6
C. Just after line 7 (that is, as the method returns)
D. Never in this method.

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