單項(xiàng)選擇題

public static Iterator reverse(List list) { 
Collections.reverse(list); 
return list.iterator(); 
} 
public static void main(String[] args) { 
List list = new ArrayList(); 
list.add(” 1”); list.add(”2”); list.add(”3”); 
for (Object obj: reverse(list)) 
System.out.print(obj + “,”); 
} 
What is the result?() 

A. 3,2,1,
B. 1,2,3,
C. Compilation fails.
D. The code runs with no output.
E. An exception is thrown at runtime.

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